First off...
Chasing Amy = Awesome movie. +1 to you.
But I think it does come down to insecurity ultimately. I don't know if my ego could deal that well with dating someone with a past in porn, I think I would always feel that I would be falling short sexually for her.
*shrug*
_________________________
"I don’t want to live in a world where a man won’t cum on my face."
-Holly Randall