Anything so freaky that you WON'T do it with ya' wifey / hubby ?

Heard a dude say he won't nut in his wife's face and heard a chick said she wouldn't ride her dude's face or some shit but other niggas, she don't give a fuck.

I'm thinkin' that if you went as far to get married or call someone your "main", that means that you'll go all out and do all the kinky shit that you always wanted to, right ?