Because it goes good with chips.
or
Three skunks fighting over a pickle
First dog: My master calls me Furball. How about you?
Second Dog: My master calls me Sitboy
or
Because all his other wives support Hillary.
or
To get to the baaaaarber shop
or
Your wife comes back to you, your dog returns to life and you get out of prison.
or
"Let me see your birth certificate".
or