I'm deliberately not asking, "why are you straight/heterosexual?" because that's as impossible of a why as asking me why I identify as bi.
I don't think sexual orientation should be a consideration in chosing a platonic partner, but looking around, it clearly seems to be, particularly among men, and I'm curious if there's a particular reason why.
Men, why are you only interested in platonic cuddling with women?
My experience with therapy is that I've always had better treatment from male therapists, and my sexuality notwithstanding, I think I'd be more comfortable with a male cuddle partner in a one on one setting. Unfortunately, I seem to be largely alone in that on this site, among what profiles I've browsed.