Genuine question abt anal sex

Saw that one post w the title anal sex and it got me thinking . So in BL and other things w suprise anal they usually go at it w/o douching, but wouldn't there still be some leftover poop particles left inside your large intestine? Obviously plot armor exists so everyones butthole smells like flowers and they probably don't care, but irl is that not an ick? How does that work like do men just not care abt shit inside as long as they can get laid? Cause suprise anal does seem very fun but I feel like I wouldn't be able to enjoy it w/o stressing abt if Im getting shit on them