Your comment shows that your conception of sexual orientation has to do only with 'functionality,' that is, which orifice is selected.
Homosexuality is a grave disorder which is manifested in a number of ways, ONE of which is homosexual activity (in some cases.)
It is erroneous to focus only on genital activity (or lack thereof.)
I'm just applying my concept to this particular situation--a population that is supposed to be essentially asexual. What way other than functionality can somebody be judged who has supposedly taken a vow of celibacy and shuns all sexual activity?
My conception of homosexuality would be completely different if it were aimed at the general population.