How to tell the sex of flies
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.

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

"3 were on a beer can,
2 were on the phone”
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