Well it depends if she likes it
Yes.
Nasty.
by licking my butt
Because it feels good and probally taste nice
it is something ok look it up on Google ok u lazy butt
It is simply a bad dog behavior.
no.
mask on ok
No
Its called a Rim Job, a rim job is licking thee butt hole.
licking butt
Your dog is not going to get sick from licking a cat's butt. Animals are always licking their butts.