Sly

I was walking through the desert and came upon a snowman.

I said, "How come you're not melting?"

The snowman said, "I'm made of dry ice."

I said, "That's too bad. I've run out of water and I'm very dehydrated."

The snowman said, "I'm sorry, I can't be of assistance."

I noticed a drop of water fall from the snowman's head. I realized the snowman was lying. I understood. Self-preservation is a powerful motivator.