No, not at all, but there is always a conquest type of fantasy I suppose, which I figured was part of the "tease" (look but don't touch, you can't have me).
Besides, that's not entirely fair. If a guy picked up a girl wearing an "I Love My Boyfriend" t-shirt, is it the guy ruining a relationship he isn't even apart of and knows nothing about, or the girl who went home with the guy despite having a boyfriend who ruined her own relationship? (if she even has a boyfriend and isn't just wearing the shirt as a tease)
I think I understand your point, and that is definitely a fair criticism. I just think there would be sense of conquest at getting someone who is supposed to be unobtainable, particularly if you're intentionally being teased in the sense of that shirt.
I'm not saying there might not be a sense of guilt afterward though, which I think would be natural, but if a guy or girl is willing to cheat on their partner, the relationship is already ruined by that willingness and the person sleeping with them isn't really ruining anything at that point.
But, keep in mind, all this is coming from someone who married my college sweetheart/first love and never did anything like that.
My initial comment was really just to point out that the "tease", as the photo was aptly named, was definitely working, but it is interesting to hear another person's views on this kind of stuff.