How To Tell Their Sexes

When a wife walked into her kitchen one afternoon, she was surprised to find her husband stalking around with a fly swatter. Curiously, she asked, "Honey, what are you doing?" And he responded, "Hunting Flies." So the wife asked, “Have you killed any, yet?" And the husband replied, “Sure! So far, I have gotten 2 females, and 3 males."

Now intrigued by her husband’s reply, she asked, "How on earth can you tell them apart?" And her husband smiled knowingly, and responded, "Simple, 2 were on the phone and 3 were in a beer bottle cap."