Go and stand on the balcony...

A couple living in a small apartment were experiencing a problem - they wanted an afternoon quickie but didn't know what to do with their seven year old son who was at home.

Finally they asked him to go out on the balcony and play a game, shouting back in at them what he could see.

The parents got down to business while he stood outside.

"I can see the Brown's cat" he shouts " and the Wilson's are watching TV, and the Johnston's are having sex!"

"What????" exclaimed both parents, horrified. "How do you know???"

And he replied:

Spoiler:

"well their little boy is standing out on the balcony..."

Good one