Yeah dawg, it seems weird to me to be saying it too. I have no idea if it seems weird to him too, or if he's ok with it.
He has high T, so I'm not sure what the freak is up with him not having sexual thoughts but this is not the first time he's said that.
He does have very strong ADD tendencies but I have no idea how that factors into the mix, if at all. He literally cannot do two things at once. He is easily overwhelmed by new things. Etc.
So the thought that he doesn't think about it doesn't necessarily surprise me because I've seen how much concentration it takes him just to complete whatever he's doing.