Okay, to be fair, I do too, but that's just because I hate myself.

Here's a couple reasons:

1: It would mean punishing myself. I cut myself pretty regularly, so it's the same principle.

2: I feel a compulsion to distance myself from attraction to women, because I'm ashamed of it. I'm disgusting, inferior, and male, and as I constantly remind myself by reading /r/GC and related subs, me being attracted to women makes me an abomination. If I could just beat the male heterosexuality out of myself (I try to self-harm myself as a sort of reverse conversion therapy), then maybe I could turn myself into a gay man instead of a straight one and I wouldn't have to hate myself anymore.

3: I have a very low sense of self-worth, and I like feeling useful and wanted. If I'm being used, then I'm being useful.

4: I don't think I deserve to be happy. Dating a guy would mean dating someone I didn't want and wasn't attracted to, so I wouldn't have to worry that I was being selfish.

5: Dating a woman would make me feel super gross because I'd always be maler than she was. It would just feed into my inferiority complex by putting me constantly in the proximity of someone who not only was everything I could never be, but I'd also constantly feel like shit because she was doing me a favor by dating me, a fake woman. If I was dating another man, I'd just be dating my equal, and wouldn't have to constantly feel inferior to him.