A great dane, a scotty, and a chihuahua were sitting in a bar, knocking back a few, when a beautiful bitch walked in.
"Okay, boys," she purred. "I'll make a very happy dog out of whoever can come up with the best proposition, using the words 'cheese' and 'liver'."
The great dane thought a moment, then stated: "I don't like cheese, but I sure like liver, and I like you, too!" He panted and wagged his tail.
The lady just looked away.
The scotty immediately said, "I like cheese, and I like liver, AND I like you!" and wagged his tail expectantly.
She ignored him.
Then the chihuahua growled "Liver alone! Cheese with me."
They left together.