A guy walks into a bar with a dog.  As they sit down at the
counter, the bartender tells them, that no dogs are allowed.
The dog looks up and says, "I don't see any sign posted about
dogs."

To which the bartender looks at them both and exclaims
"Hey! You can talk!  This is wild!  I'm buying you both a beer".

They both thank him and proceed to enjoy their libation.

After awhile, the man excuses himself to go to the bathroom
and the bartender leans over the bar and asks the dog if he'll
"go over to the 7-11 across the street and ask for change from
a $20 to buy a newspaper.  He tells the dog that his friend
across the street would get a kick out of it.  In return, he'll buy
beers for the both of them for the rest of the day and keep the
$20 for his trouble.

The dog agrees and taking the $20 in his mouth, walks out of
the bar.

When the man comes out of the bathroom, he asks where his
dog has gone and panics when he is told the dog has gone
outside without him.

He runs outside and begins to cross the street when he
hears a sound in the alley next to the bar.  When he turns into
the alley, he discovers his dog humping a French Poodle.
Shock, the man looks to his dog and says "Rex, how could
you?  You've NEVER done anything like this before!"

The dog looks up at him and says "Frankly, I've never had
a $20 bill before!"