The more you take, the more you leave behind. What is it?
The answer is supposed to be "Footsteps" and the wordplay is on the word "take". I walk around the room, looking at my feet helpfully, and someone usually guesses it pretty fast. But today, someone said, "Girlfriends." I had to concede that is a correct solution, but far too cynical for a seventeen-year-old to have.