Once I went to a country bar and noticed a horse in a fenced area next to the bar that you could see from inside.
I inquired to the bartender about the horse and he told me it belonged to the bar owner.
I told him I bet you $5 dollars I can make that horse laugh. The bartender agreed to the bet and I left my stool and went around the building and in sight of the bartender I lifted the horses' ear and whispered into it ... seconds later the horse started laughing its ass off.
I came back inside and the bartender gave me my $5 winnings.
A few drinks later I told the bartender, "I bet you $100 I can make that horse cry". The bartender agreed to the bet and again went outside and approached the horse ... seconds later the horse was weeping like a baby.
When I returned in astonishment the bartender asked me, "what did you do to make that horse laugh then later cry?"
I explained ... the first time I told the horse, "my cawk is bigger than yours"
On the second trip I unzipped my zipper and showed him.