Tex. Civ. Prac. & Rem. Code § 81.008
(a) In an action for sexual exploitation, evidence of the plaintiff's sexual history and reputation is not admissible unless:
(1) the plaintiff claims damage to sexual functioning; or
(2)(A) the defendant requests a hearing before trial and makes an offer of proof of the relevancy of the history or reputation; and
Added by Acts 1993, 73rd Leg., ch. 573, Sec. 2.01, eff. Sept. 1, 1993.