Beastiepoo's post made sense (even though viewed from the mans point of view ;) ..).
Anal is like desert, its really good but only having anal sex all the time would make you bored of it I think. The coolest thing with anal is the taboo around it .. its just wrong, and therefore so damn good (Its all in our heads). Ok, the tightness isn't wrong either, but I dont think that's the mainreason some ppl love it.
Getting too much of it would prob. take away some of the coolness though.
So, to sum it up... I usually eat steak when Im hungry but Im not going to turn down some really fatty desert sometimes ....
btw, what's up with the anal gaps in pornos nowadays.. I dig anal, but closeups on huge stretched out buttholes is just a plain turnoff?