I had one more thought here, and figured I should share in case it's helpful to you. Assuming that this girl and her boyfriend know you haven't had any other kind of sexual experience before, I'd say that her asking about this with you tells you that SHE probably doesn't have the level of life, sex...

So, I'm good friends with this girl who I've known for a while now, and she has a boyfriend. So today, the topic of sex came up while I was talking to her- We're both bisexual, and she, apparently, has had a lot of sexual experience with her boyfriend, including more 'extreme' kinky stuff. I haven't...