TLDR: I got a look at my best guy friend’s d***, really liked what I saw, and now I can’t stop thinking about letting him f*** me.

So I’ve had a guy bff for like 8 years now. He’s not gay or anything, we’ve always been literally “just friends” and hang out often. Well a couple of nights ago, we somehow got into a conversation about ‘pretty’ genitalia VS ‘ugly’ genitalia. Somehow this led to me asking him to show me his, because I was just genuinely curious to see what he’s packing. So he whipped it out for me. I just politely said something like, “Cool, not bad”, but actually, I really REALLY liked what I saw, and I’m pretty sure I wouldn’t be opposed to letting him put it inside of me. But I have no idea how I should make my offer, or even approach the subject.