Sharing is Caring

There's a commercial I see on television sometimes. It's a faucet commercial, for a showerhead of some sort. The advertisement has a couple-a man and a woman racing each other to be the first one home and into the shower. The man gets there first, and locks the woman out of the house, fastening the chain on the back of the door.

But the first thing that pops into my head when I see it is why don't they just get in the shower together?