How to Tell the Sex of a Fly
SexOfAFly01.jpg
A woman walked into the kitchen to find her husband stalking around with a fly swatter.

 "What are you doing?" she asked.

"Hunting flies," he responded.

"Oh. ! Killing any?" she asked.

"Yep, 3 males, 2 Females," he replied.

SexOfAFly02.jpg
Intrigued, she asked, "How can you tell them apart?"

He responded,
"3 were on a beer can,
2 were on the phone."