A woman walked into the kitchen to find her husband stalking around with a fly swatter.
"What are you doing?", she asks.
"Hunting flies!", he responded.
"Oh! Kill any?", she asked.
"Yep, 3 males, 2 females", he replied.
Intrigued, she asked, "How can you tell them apart?"
He responded,
"3 were on a beer can and 2 were on the phone."
