Can't expect of men to stay awake once they're done with having their way with you, huh? ;) Glad to read that you two had fun, and that everything went so fine! Now all you have to do is wait for him to get addicted :)
On a sidenote, "it doesn't turn me on more than vanilla sex" does not necessarily mean it doesn't turn me on more than vanilla sex. I have a few things I'll swear before any jury I don't enjoy too much, but it's not true nonetheless. It's just me being embarassed to admit it, so I try working around admitting it (or simply draw a blanket over my head, which most of the time is answer enough anyway) :)
Anyway, I hope that things continue to be as promising as they started out!