The eating butt thing?

Sooo... I want to know how it feels to women to have it done? & does anyone do it to their guy? Like does he like it, what does it taste like? Also, does your guy let you stick your finger in his butt? I know this is a lot, but I'm curious & kind of want to do it it idk how to BC my guy idk if he will just let me, so tips on how to do it anything please!????