Fairly certain I'm a straight dude with minimal interest in, ehh, sex stuff. I find girls attractive, yeah. I can recognize when a guy could be handsome or attractive, but I wouldn't be interested in banging them. I'm squicked out at the thought of sex stuff. The human body is kinda nasty, yo. I mean, some of you guys might be all rainbows and sugar inside, but personally there's all this phlegm and blood and guts and ick. Nasty.
I'm beginning to think it's a psychological thing. If a hypothetical Johnny was Heterosexual but reclusive, and therefore tended to avoid women and hang out with men, then Johnny would never have the opportunity to develop romantic attachment. As romantic attachment is usually caused by a growing level of trust and contact with a person, it comes down to the division of whether his Heterosexuality would stop him from getting that addiction to his friends, or if he would develop it normally, or if he would just become bisexual.
I may or may not be a Johnny Hypothetical. I like girls, yet I don't make tons of effort to befriend girls or hang out with girls, and as a result when I do hang out with friends they're all dudes. Yeah, I probably love my close friends. Would I want to bang them? Nah. It's an emotional attachment.
It's not like I
don't want to have friends who are female. Some of my best friends as a kid used to be girls. After that wonderful awkwardness of middle school there's just generally a divide between me and girls. Few common interests, minimal social contact. I'm passive when it comes to hanging with friends. Unless a fried invites me, I usually just assume they'd rather do something else and content myself with my own activities. Since girls usually don't invite me on anything, or initiate conversation, or keep in contact with me, or really even make first contact with me, I just don't keep friendships (at least as I'd define friendship) with girls. I'm probably partially to blame though. What if I make friends with some girl (somehow) and it blossoms into romance? Then what. It'd be awkward and terrible and wouldn't work. Nope.
As for the whole guilt discussion, I do feel guilt for feeling attraction. Part of that would be due to my lack of action towards any attraction. Lack of action would be due to multiple factors, including inexperience at dah romances like flirting, dislike of the whole sex part of attraction, general social awkwardness, and the fact that pretty much any girl I'd be interested in I automatically consider to be completely out of my league. Most of the guilt would probably be from my squick from sex stuff.
...Eh. I dislike talking about this kinda stuff so much. Feelings are not logical. Feelings are weird. Anyway, there's my rambling wall of text contribution.