I think at least half of sexual compatibility is actually mental compatibility.
There aren't too many "sexual incompatibilities" that can't be harmonized by communication, and one problem is that shame and "privacy" and religious training keeps people from opening their mouths (so to speak
). One or both partners could go for years without being completely satisfied or as excited as they'd like to be, just because they're too embarrased to bring it up (again, so to speak... d'oh, stop!) It can take a lot of courage and practice to stay in communication when it comes to intimacy (see, I held back that time.)
The other BIG part really is built-in physical stuff, though, and it would be a shame not to find out about that till the wedding night. If you don't love the way your partner smells, for instance, forget about it. That might be a friendship, but it's not much of a marriage. Don't waste your time. Also, I believe that a woman must love a man's penis to really love the man. I think if she doesn't treasure it and want to be near it as often as possible, especially if she's repulsed by it, a romantic relationship will never be ideal, to say the least!
I think if you're waiting till your wedding night, it would be an excellent idea to at least do some heavy messing around so you make sure a) you love the way each other smells and b) you fall in love with each others' bodies. Then in neutral moments (not during the make-out session!) also practice having explicit conversations about what turns you on & off, fantasies, must-haves and can't-stands regarding sex and intimacy. If you find your partner refuses to talk about it, you've got a problem and might want to consult a therapist together before you get married.
Sex talk in the morning! I love it.