truth
O.K., since we are all in a confessional mode, let me reveal that I am a total he-man.
Seriously, I do feel that there are (I forgot the operative scale) ones (total gays) and sixes (total heterosexuals), although in the latter case culture is SO important a factor that lots of fours and fives may be passing for sixes. And it is the ones that we are most interested in here. I know guys and gals who seem to me SO inherently gay that I FEEL sure that they are profoundly gay. In such cases I strong suspect a neurological hard-wiring that renders them pure and non-convertible. This applies, I suspect, to the pure sixes as well. Although I will admit that I was TOTALLY shocked upon hearing that the sexual (masculine) identity model of my youth, Randolf Scott, was the lover of Cary Grant.
Well, there's still Gonad the Barbarian!
The rest of us, however, are in-between, able to "cathect" to same sex individuals as well as all kinds of sex objects: trees (I know of a case), children (we all know of such cases), very elderly people (a bit more rare), domineering individuals (a down-right sub-culture) etc. etc. Most men and women are capable of enjoying same sex relations and yet not be, in my judgement, true gays (consider prison life). Most of them would prefer a happy heterosexual marriage. yada yada.