I think the thing is, if you're gonna ask straight out, you really need to know and trust the person well enough for them to handle that kind of revelation. If you ask someone who you vaguely know or have chatted to a few times, of COURSE they're going to say no. They'd be idiotic not to xD
And hey, if you asked people who you thought were good friends if they were interested and they then ditched you completely, it kinda suggests that their friendship wasn't worth that much in the first place. I'm not saying that a good friend will always agree to go along with that kinda thing because it's entirely up to them, but they certainly won't alienate you for bringing it up.
All I know is that from my own experience and the experiences of people who are close to me, people who are open about their sexual interests are FAR more likely to get what they want
