It sounds like this guy may need a little instruction.
I suggest you just dive right in with him, if he acts like he's
not attracted to your labia, then you may just have to teach him how
wrong he is. I predict that you'll have him fully converted into a
large labia lover in no time.
Good luck, and have LOTS of
fun with this, I have a feeling he will.
XOXO t_d