dirty ass licking

Me and my boyfriend were doing a 69 and he decides to lick my asshole yeh he sometimes does this but I was so not ready because I went to the toilet to do a number two earlier that day I wiped good it was totally clean I swear but you can never be totally sure, after he licked he like spat then licked again but went back to me vagina 😁 I feel so embarrassed, he never said anything and we still fucked good after that but still that's so gross and I feel bad for him 😂😁🙃