While I do think that sexuality has to be hardwired in some way, there is reason to think that in some circumstances sexuality is chosen or modified. Unless the popular stories of prison life are way off base, homosexuality is prevalent when hetersexuality is not an option. I have no idea if the 'psychological life' of this kind of sexual choice is any different than the 'psychological life' of homosexual life under less extreme circumstances. There's also the 'college lesbian' situation. I am also under the probably mistaken impression that the sexual choices of middle aged women is somewhat influenced by the lack of available male companions.

I know there have been some studies of brain differences between hetero/homo but I haven't seen a clear argument about whether these differences are cause or effect.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13