A man walks into a bar and sees a jar of coins

The man asks the bartender what the jar of coins is for. The bartender tells the man that they have a horse in the stable out back, and if the man can make the horse laugh, he gets to keep the jar of coins which is full to the brim, but has to pay $1 for every attempt at making the horse laugh. The man decides to have a go and sure enough, leaves the stable with the horse laughing hysterically. He finishes his drink and takes the jar home with him.

Fast forward a couple months, the man enters the bar again to see that the jar is full. He asks the bartender if he can have another go at making the horse laugh. The bartender says he can, but this time he has to make the horse cry. Again, the man enters the stable, and upon leaving, the bartender notices that the horse is crying. As the man picks up the jar of coins, the bartender asks - "So how did you do it? No one has ever managed to achieve it!"
The man replies:
"Well you see, the first time i told the horse my penis was bigger than his"

"The second time, I showed him."