The defendant Edward J. Sefranka was convicted in the Superior Court in the county of Plymouth for being a “lewd, wanton and lascivious person in speech *109 or behavior” in violation of G. L. c. 272, § 53. 1 He appeals on the ground that the words on which the conviction was based are protected by the First Amendment to the United States Constitution and art. 16 of the Massachusetts Declaration of Rights. The statute is also challenged as unconstitutionally vague. We reverse the conviction.
The facts are not in dispute. As detailed in the police report, which formed the statement of agreed facts both at trial and on appeal, three plainclothes police officers went in separate unmarked cars to a public rest area on Route 24. They did so after receiving “complaints” about the rest area; the nature of the complaints is not specified in the police report. When the police arrived, they saw several parked cars with male occupants. The police noted that the men would flash their parking lights at each other, whereupon one would get out of his car, approach the other car whose lights had been flashing, and get inside the other car; the two men would “disappear” for a few minutes. The police officers saw the defendant approach two cars, but there is no evidence of his having participated in any sexual activity while at the rest area, and the Commonwealth does not argue otherwise.
The police officers decided that one of them should pull into the line of cars that were flashing lights and “try [his] luck.” A while later, the defendant pulled behind the unmarked cruiser and flashed his parking lights. After several minutes, the police officer flashed his lights back at the defendant. The defendant then approached the cruiser, conversed with the officer, and invited the officer to return *110 with him to his home and engage in oral copulation. The officer responded that he did not want to leave the rest area and indicated that he preferred the sexual activity to take place at the rest area. Replying that it was not safe at the rest area, the defendant said, “Well, I guess I’ll see you later,” got into his parked car, and drove away. He was arrested a few minutes later and charged with being a disorderly person and a lewd, wanton, and lascivious person, both in violation of G. L. c. 272, § 53. He was convicted of the latter charge only, 2 and appealed to the Appeals Court. The case was transferred to this court on our own motion.
We hold that the “lewd, wanton and lascivious persons” provision of c. 272, § 53, unless aided by appropriate judicial construction, is unconstitutionally vague. Under the construction we shall establish in this opinion, the provision prohibits only the solicitation or commission of a public sexual touching, in the presence of persons who may be offended by the act. As so construed, the provision is neither vague nor overbroad.
An essential principle of due process is that a statute may not proscribe conduct “in terms so vague that men of common intelligence must necessarily guess at its meaning.”
Connally
v.
General Constr. Co.,
On the other hand, a law is not vague if its meaning is ascertainable by reference to similar or related statutes, or if the questioned terms have a commonly understood meaning. See
Commonwealth
v.
King,
Having in mind the above principles, we turn first to the language of the challenged provision punishing “lewd, wanton and lascivious persons in speech or behavior.” This language, standing alone, fails to inform a person of ordinary intelligence what conduct is proscribed, as there is no commonly accepted understanding of the quoted terms. Cf.
Commonwealth
v.
King,
In our search for a clear meaning of the challenged provision, we next examine its history and its function in light of other provisions of § 53. “Lewd, wanton and lascivious” persons, along with the “idle” and the “disorderly,” have been punishable in this Commonwealth since at least 1699. See
Commonwealth
v.
Templeman,
Most of the provisions in § 53 have been attacked for vagueness. See
Commonwealth
v.
Templeman,
The cases construing the “lewd, wanton and lascivious persons” provision, however, provide no greater degree of specificity than do the terms of the provision standing alone. Before the 1978 case of
Commonwealth
v.
Templeman,
In
Commonwealth
v.
Templeman, supra,
we limited the reach of the “lewd, wanton and lascivious persons” provision in certain material respects. We said that the provision can be applied only to public, not private, conduct.
Id.
at 537. This conclusion was in line with our reasoning in
Commonwealth
v.
Balthazar,
We thus conclude that Massachusetts decisions do not provide a clear and definite content for the “lewd, wanton and lascivious” provision. As written and construed, the provision fails to provide fair warning of what conduct is forbidden and hence is unconstitutionally vague, rendering the defendant’s conviction invalid.
8
For like reasons, decisions in other jurisdictions have found statutes with wording similar to the § 53 provision unconstitutionally vague. See
Morgan
v.
Detroit,
Our conclusion that the § 53 provision is unconstitutionally vague as construed by past decisions does not require us to invalidate the provision. As noted earlier, if a reasonable narrowing construction to a vague statute can be supplied, this court has done so in order to sustain its validity. We have encountered great difficulty in attempting to
*116
define specifically the conduct proscribed by the “lewd, wanton and lascivious persons” provision. Given the history of the provision and its apparent initial application primarily to prostitution, now punishable as a separate offense,
Commonwealth
v.
King,
We have examined other sex-related criminal offenses established in our statutes. Separate proscriptions already exist in Massachusetts against indecent exposure, G. L. c. 272, § 53; lewd and lascivious cohabitation by a man and woman not married to each other, c. 272, § 16; “open and gross lewdness and lascivious behaviour,” c. 272, § 16; fornication, c. 272, § 18; crimes against nature, c. 272, § 34; and unnatural and lascivious acts, c. 272, §§ 35, 35A. The “open and gross lewdness” provision has been said to be “closely similar” to the offense of indecent exposure,
Commonwealth
v.
Broadland,
The California Supreme Court’s opinion in
Pryor
v.
Municipal Court for the Los Angeles Judicial Dist.,
In order to satisfy constitutional standards of specificity, we think a similarly definite construction is appropriate here. We therefore construe the “lewd, wanton and lascivious persons” provision to prohibit only the commission of conduct in a public place, or the public solicitation of conduct to be performed in a public place, when the conduct committed or solicited involves the touching of the genitals, buttocks, or female breasts, for purposes of sexual arousal,
*118
gratification, or offense, by a person who knows or should know of the presence of a person or persons who may be offended by the conduct. As so construed, the provision does not impose generalized, indefinite behavioral standards under which the criminality of conduct depends on the personal predilections of the judge or the jury; nor does it invite discriminatory enforcement by police and prosecutors. Further by limiting the speech proscribed to the solicitation of particular public sexual conduct which is itself criminal,
10
the construed provision does not reach speech protected by the First Amendment, and hence avoids any problems of overbreadth. See
Gooding
v.
Wilson,
In summary, we hold that the “lewd, wanton and lascivious persons” provision was unconstitutionally vague as construed by our past decisions in effect at the time of the defendant’s conviction. Thus the conviction must be reversed, and a finding of not guilty entered. Under the construction established in this opinion, the statutory provision complies with constitutional standards. 11
Judgment reversed.
Finding set aside.
Judgment for the defendant.
Notes
General Laws c. 272, § 53, as amended through St. 1973, c. 1073, § 20, in its entirety, reads as follows: “Common night walkers, both male and female, common railers and brawlers, persons who with offensive and disorderly act or language accost or annoy persons of the opposite sex, lewd, wanton and lascivious persons in speech or behavior, idle and disorderly persons, prostitutes, disturbers of the peace, keepers of noisy and disorderly houses and persons guilty of indecent exposure may be punished by imprisonment in a jail or house of correction for not more than six months, or by a fine of not more than two hundred dollars, or by both such fíne and imprisonment.”
It is unclear from the record at what point the disorderly person charge was dropped.
As the Supreme Court of California noted in
Pryor,
“Some jurors would find that acts of extramarital intercourse fall within [the challenged terms]; some would draw the line between intercourse and other sexual acts; others would distinguish between homosexual and heterosexual acts. Thus one could not determine what actions are rendered criminal by reading the statute or even the decisions which interpret it. He must gauge the temper of the community, and predict at his peril the moral and sexual attitudes of . . . the jury.”
The imprecision of these words is seen also in their dictionary definítions. Each of the three words is defined with reference to the other two, as well as to further synonyms such as “unchaste” and “lustful.” Webster’s Third New Int’l Dictionary 1301, 2575, 1274 (1961). See
Commonwealth
v.
A Juvenile (No. 2),
We reached our conclusion in Balthazar on the basis of recent cases expanding free speech and privacy rights in sex-related areas, and “in light of our own awareness that community values on the subject of permissible *114 sexual conduct no longer are as monolithic” as they were in past decades. 366 Mass, at 301-302.
The defendant in the present case offered to commit the sexual act in the privacy of his own home, and not in any public place.
The
Templeman
opinion did refer, without comment, to a statement by the Appeals Court that the terms describe “a type of person who commonly engages in or is willing to engage in sexual conduct which is repugnant to prevailing moral standards.”
Templeman
at 536, quoting
Commonwealth
v.
A Juvenile (No. 2),
In the view we have taken of this case, we need not determine whether, as the Commonwealth contends, the defendant’s solicitation of oral sex constituted “fighting words,” for even “fighting words” may not be punished under an unconstitutionally vague statute. See, e.g.,
Plummer
v.
Columbus,
When statutes with similar phraseology have been held not vague, it has been because the words were paired with other statutory terms providing a meaningful context, see
Anderson
v.
State,
Cf.
Commonwealth
v.
King,
We note that even when judged under the narrowing construction adopted in this opinion, the defendant’s speech and conduct falls outside the statutory prohibition. No public sexual conduct took place; nor did the defendant solicit any such conduct.
