Fred, Bob and Mike visit a whorehouse.
Fred comes out of the first bedroom and says, "She put a powdered donut on my d**k."
Bob comes out of the second bedroom and says, "She put a glazed donut on my d**k."
Mike comes out of the third bedroom, holding two dollars. Fred and Bob ask, "Did she donut you?"
"No" says Mike, "she told me to go and buy a box of Cheerios."