Ed was in bed with his girlfriend when they suddenly heard the front door lock opening. She told him "It's my husband. He's an NFL linebacker and he's back from practice early. Run or he will tear you limb from limb!".
Ed grabbed his clothes and jumped out the window and and ran out to the street only to find it was raining and the city wide marathon was in full swing. He ran and joined the crowd.
One of the other runners saw him and asked Ed "Do you always run naked?" Ed was pretty quick witted and replied "Of course. It is cooler with no obstructing clothes to slow me down. In fact I am an ancient history professor at the community college and up until the 1700's all the Olympic sports were done in the nude."
Another runner asked "Why do you carry your clothes with you when you run?" Ed again replied "Well if I win or place highly the sports photographers all want a picture but they can't post it of me naked so I can dress quickly and pose for them."
A third runner sagely asked "Do you always wear a condom when you run?" Ed quickly replied "No, only when its raining."
