I think very little of the cross dressing that goes on here is really kink or fetish related. Crossdressing can be extremely sexual, but in my opinion a big part of that is that for people who's libido is driven by testosterone, everything tends to become sexual very easily, and if one has even a partial female identity, it makes sense to be sexually stimulated while expressing that identity. If part of you feels feminine, how else is that part going to express itself except by presenting as a woman? The extreme case, trans women, tend to fantasize about being women during sexual activities because they ARE women. I don't believe that most women, when they fantasize about sex, imagine themselves as being anything other than women in their sexual fantasies.