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?"

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