A woman walked into the kitchen of their house to find her husband standing in the kitchen holding a fly swatter.
He was standing still, the fly swatter held up as if ready to strike.
“What on earth are you doing?” his wife asked him.
“I’m hunting flies” her husband responded.
“Oh right! Have you killed any?” his wife asked.
“Yep, sure have” her husband replied with a grin, “I swatted three males and two females”.
Intrigued by his answer, she asked her husband “Flies all loothe same, how can you tell which is which?”
“Ah easy”, her husband replied, “three were on a beer can, two were on the phone!”
Image used under a Collective Commons License from https://pixabay.com/vectors/flies-drinking-beer-festival-party-161350/