Holup. Are you under the impression that Merager was on the Kumbaya end of the ASPD scale? Not feeling you. Do you recall his rap sheet? It was rather colorful and ungentlemanly. Pretty sure we can dismiss any thoughts of peer pressuring the brother into a model of chivalrous behavior. Thomas likely didn't consider a gentleman's conduct to be applicable to a 'woman' either.
We've talked about the Wi Spa at length, and I still think they could have gotten around the gender/sex discrimination in the same way they got around the open nudity inherent to its operation: state plainly that this experience was designed to recreate the traditional Korean experience, and the suspension of nudity norms went hand-in-hand with the sex segregation. Like, I can't think of any reason that clothing was flatly prohibited other than 'well that's how we did it back in Korea'. Sex segregation should apply on the same mutual agreement, without any charges of discrimination.
And that's my argument. Determine when and where biological sex segregation is needed/desired, and get that codified into law. It circumvents the whole ambiguous gender dilemma. Gynecologists are unable to perform exams on males, as a practical matter of training, and a bikini waxer should have the same exemption- they are consenting to work with the female anatomy, not the male. Then we can bypass all the 'they're all cross dressing pervs and fetishists' bull ◊◊◊◊.