I've gotta confess, I'm not overly a fan of his message to you...just sorta rubs me the wrong way. Dunno...can't really put a finger on it. :/ I'm concerned, I suppose, that he's primarily interested in sex, given how quickly it was brought up. My fear, then, would be that the rest is only "fluff." But that's my suspicious side kicking in.

As far as your current BF goes, he owes it to you to take it seriously. I can understand his situation...I'm open minded, or so I like to think, but the concept of hurting my partner in any capacity is unthinkable to me. I appreciate his naivety in the subject, as it's likely close to my own, but he owes you to at least field the discussion with you in a serious manner. That's not a promise that it'll click...but he does, at least, need to communicate with you.