Three Kids

Haven't we all experienced this? Three boys always come home from school the same way. One day as they pass the fence near their house, they look through a hole in the fence. They see a naked woman standing in the yard, two of the boys stare at her while the third one runs away.

The next day they look through the hole and see the same lady, still naked. The two boys still look at her, while the third one runs away again.

The next day as the three boys look through the hole, and the third one gets ready to run away, the two other ones ask the third one, "Why do you keep running