That reminds me of the time that I told my husband that this guy wanted to be my internet friend. He said "Just as long as the mofo don't come up to my door!".
Funny stuff, my ex husband was the same way. I think we know our limits, but having opposite sex friends can be harmless and rewarding. In this situation (the topic) I would enjoy it for what it is worth, but I would have my back foot down in case my radar went off.