He orgasms but he does not ejaculate; and although he has a sizable penis, his testicles are more like the size of grapes than eggs.
He struggles a lot with feeling abnormal and un-masculine.
Or, maybe you talked about a specific song and it came on the radio.
Either way, if you find yourself thinking of them during the day, let them know.
I think that because he appears more feminine than most men and is more often hit on by men than women, I worry that he would feel more comfortable or "normal" with a man.