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?"

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