A bit of a sexist joke perhaps but, oops, I can see it's often true! #funny

I stopped at a friend's house the other day and found him stalking around with a fly-swatter. When I asked if he was getting any flies, he answered: 'Yeah, three males and two females.' Curious, I asked how he could tell the difference. He said: 'Three were on a beer can and two were on the phone.'