Two ugly blokes are sunbathing on the beach.
One says "With a face like yours, how come you get so much attention from women?"
"Hidden talents mate" says the other. "I just put a potato down my trunks. You try it."
The next day the first guy puts a potato down his trunks and struts along to the beach to meet his friend. But all the women look horrified or giggle and point.
When he reaches his friend he says "Your idea was rubbish. This potato isn't impressing anyone."
"Not surprised" his friend replies "You're supposed to stick it down the front"