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 replied.

“Oh, killed any?” she said.

“Yep, 3 males, 2 females,” came the answer.

Intrigued, the wife asked, “How can you tell them apart?”

Husband: “3 were on a beer can, 2 were on the phone.”