He has never even tried it, he has decided a priori that "pussies are gross" a very misogynistic statement. A whole erogenous body part of approx half of the planet's population is disgusting when you have to perform a seuxal act that doesn't center your pleasure as a man. Yet he gets his dick sucked all the time.

He doesn't need flavored lube, he needs to question his deeply sexist views. There's no past bad sexual experiences (bc he hasnt had any, has never performed oral), no trauma (most men don't actually, trauma is cited as a reason for not wanting to perform oral mostly by women, rarely by men) he has just decided pussies are gross. This is 100% sexist, OP is dating a very sexist man.