How to Tell the Sex of a Fly

A MUST READ! How to Tell the Sex of a Fly This joke made us think of Dr. Don Martensen MPHS Jan 66 who studied fruitflies in graduate school in California.  He could tell the sex of the flies on the fly. 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."