There was this really buff body builder running down the beech one day and noticed that no one was paying him any attention. He also noticed that all these really hot girls were just poring themselves over this really scrawny nerd.

One day the body builder had enough of it and asked the nerd what his secret was.

The nerd tells the bodybuilder, "Tomorrow before you start your jog, put a potato in your speedos."

The next day the bodybuilder is on his jog and noticed that people are literally running away from him.

Again he asked the nerd what the problem was.

The nerd responded, "You dumb ass, your supposed to put the potato in the front of your speedos."