massage yer ass muscles with a dildo err a cock fer a few minutes,, an see what happens to yer normal shit cycle.. personally,, i tell women its like a natural laxative.. i meen,, come on we all know yer constipated half yer life..
I think some do and some dont. My ex never used to as far as i know. But she did used to go and "expel" the cum/lube out of her ass afterwards, instead of leaving it in there overnight or whatever.