Meeee!!!! This is my topic!
First, you're right, you can't compare nor compete, because you don't have a penis and "men" does not have vaginas or boobs. Maybe boobs sometimes, but not vaginas. And if he is straight, and he is since he is your boyfriend, he might like the experience, but he will always prefer you over him.
It is not healthy nor normal to prefer your fantasies over your "real life". Talk about it. it is basically confidence issues from both you and him. Make sure your communication is Ok, that you're (both) not judgmental and very caring of each other.
Fantasies are for enjoy them, not to dwell on them

And if you want you can get some dildos and play with him that way?
Jean
-who would help you out, but I'm too young
