I HATE flies!
They are super annoying!!
They sit on your food, poop on your walls, buzz around your head, they just go everywhere that you don't want them to!!
So I try very hard to be diligent with keeping the doors closed and killing the flies that do make it sin before they have a chance to make a mess.
I must have taught this one well cause he is always on the look out for flies to swat. :)
The other day he came to me and said, "can we open the door so that more flies will come in?"