I'm on break at work, so I don't really have to to get past the abstract but.

Only the homophobic men showed an increase in penile erection to male homosexual stimuli.

I feel like it's a big assumption to conclude homosexual desire from this. Like sure, I can understand why you would, but I've definitely gotten erections from stimulus I didn't find sexually arousing, especially if they illicited some other strong response.

Pre-transituon I used to get rage-boners, sad-boners even disgust-boners. Estrogen has mostly eradicated unexpected erections for me, but that isn't really a factor here.