Obama went to the beach in a pair of old swim trunks that went down to his knees. He walked up to the lifeguard and asked why the girls weren't swooning over him.
The lifeguard replied "It's your swim trunks, man. You need to wear a pair of short Speedos, and put a potato in them."
So, Obama bought a new pair of Speedos, placed a potato in them, and walked the beach. Only, now the girls were snickering.
Going back to the lifeguard, he said (Well, I bought the Speedos, got the potato, and now they're snickering. What's wrong?"
The lifeguard said "The potato needs to be in the front!"
HA, HA! Potato in the back! HE, HE!