Flies
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."