A woman arrives in the kitchen and sees her husband with a fly swatter and says
“What are you doing?”
He replies: “I’m chasing the flies…”
She asks “Did you kill them?”
He says “As a matter of fact, yes, 3 males, 2 females”
Intrigued, she asks him:
“How do you make the difference between females and males?”
He answers: “3 were on the beer can, 2 on the phone.”