I'm the only one who can give you real divine messages..and here it is...it is perfectly normal and each person is into different things. The good thing for you is there are tons of guys out there that love dipping their cock in shit and wiggling it around until come shoots out their dick to clear their penis of the poo that digging back and forth in your ass caused to block the opening.
Dear prettygirl16:
You're prosterior is for the excretion of things.
-God
Good luck in finding you're man!
Let her decide on who she wants to do it w/.
Also it is normal