A new toilet!

You know those trashcans with a foot-pedal that lifts the lid so you can throw your Sunny D away?

Same principle.

When a guy goes to pee, he hits the pedal to lift the toilet seat. When he's done, he steps off. This means that the guy isn't too lazy to pick up the seat, or risk touching it with his hands, and it means that the toilet seat is always down for when the *ladies* come a-knocking.

Maybe when you step off, it flushes automatically, as well.