To drag your bare ass, preferably one that is hot, sweaty and mungy, down the driver's side windshield of someone's car to intentionally smear and smudge the glass.

When you eat dirt for the first time and leave your family to build a shack in the woods

A very arousing self-orgasmic sexual technique done by inserting your penis all the way into any insertable and penetrable object and moving your hips in a circular motion like wiping a window and then ejaculating inside while still maintaining that same circular motion.