my bOYFRIEND ASKED ME TO EAT HIS ASS????? OMG????

OKAY OMG me and my boyfriend were talking about trying new things in bed and he asked me to eat his ass?? i've always thought eating ass was weird and i feel a genuine disgust towards it but he eats my ass all the time and i just want to make him happy but idfk he said that if i don't feel comfortable that he'll understand but idk what i should do?? any tips?? tricks?? relatable stories?? someone convince me this is normal!!