When I was in high school, we lived in a house with 2 bathrooms: one for my mom and her husband, the other for the three of us kids. Bathroom use worked out fairly well, as BJ's school started a 1/2 hour after Chris' and mine, and I liked to sleep in. ("Liked"? Who am I kidding? I still like to sleep in.)
Chris would take a shower first in the morning. Yep, we're a family of morning-showers. He had the unpleasant habit of leaving his dirty underwear in the bathroom when he was done showering. Even after we asked him not to, he'd leave them on the bathroom floor. Every morning BJ and I would stumble into the bathroom to get ready for school, Chris' underwear greeted us.
We tried many tactics to get Chris to pick up his underwear. We complained to Mom. We picked them up and left them on his bed. We played soccer with them as the ball, in front of him and his friends. We used them as weapons of mass destruction.