I don't know why, but ever since I was 12 I've had a thing for panties. I don't know why it arouses me the way it does. Once when I was 13, my urges got the better of me and I ended up masturbating with a pair of my older sisters
panties. She walked in on me just as things were 'coming to a close'.....I've hated myself for not being able to kick this habit, but I can deal with the self-loathing. What I want to know is, does this mean I'm gay?
Bottom line, unless you fantasize about making out or more with guys, whether or not you happen to be wearing panties, you're not gay.
This is not a super common fetish, but not at all a rare one either, and I bet the right girlfriend at the right time in a relationship might actually find it hot. In any event, a fetish is never something you should feel ashamed of. You didn't choose to develop it, it just happened, and it does no harm.