Licking Her Ass and Pussy

I ask this mostly for gg but I posted it here since it applies to post ops. So if a girl likes getting her pussy ate and she likes her ass getting licked and all too, when do you lick her ass? Aren't you not suppose to lick the ass before the pussy? But then you see in porn where they do that anyway.

dude! if you cant lick ATP! then u should not be licking it at all!

yea dat makes sense. lol i just thought even if it were clean it would matter. But that's only how their suppose to wash which would mean that only then is it dirty.