Anal?????

My boyfriend and I want to try anal, but I'm scared because I have tried it before and it freaking hurt... we did use lube, and he started with his fingers first, but when he was going to put it in, I pushed away because it hurt.

I heard anal can be very pleasurable, but so far it hurts for me.

I am also concerned about accidentally pooping, and the smell of ass.

Any tips???