Pick three of one item..

There was three men walking down a dirt road. One was black, one was white, and the other was a mexican. It started storming really badly and they rushed to the nearest house they could find. They knocked on an old farm house as an old man answered the door,
"What can I do for you fellows?" He asks. The men then precede to explain to him they need a place to stay. The farmer agrees and say they can sleep in the barn, but warns them he has three daughters and he wants them to stay pure after they leave. The men agree and go to the barn. Later that night the daughters sneak in and seduce the men and fuck them wild. In the morning the farmer comes out with his shotgun pissed as hell.
"You sums a bitches you three go and find three of one item on the farm and bring it back here!" So they go off and the white guy returns first with three peas
"Ok Shuve them up your ass!" The white guy crying from laughter smears the peas against his cheeks. The farmer ponders on why he is laughing but ignores it as the mexican comes with some cobs of corn. He tells the mexican the same thing as the mexican can only get one and a half ear of corn up his ass before falling down from laughter.
"What in the hell is so damn funny?" The farmer finally asks. The white guy and mexican look at each other and then back to the farmer and reply.
"The black guys out there picking up watermelons."