So me and my bf are experimenting, and recently he started fingering my butt , I actually love how it feels and I never thought I would lol , but I get so afraid that there will be poop on his finger, no matter how much I clean myself beforehand, it's still something I worry about lol , is this normal? he hasn't mentioned that there was poop on his finger, he is someone that wouldn't really judge me, but I'll still feel embarrassed, does it matter? is it normal?