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 and 2 females" he replied.
Intrigued, she asked "How can you tell the sex of the fly?"
He responded, "3 were on a beer can, and 2 were on the phone."
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