DEAR MISS MANNERS: A friend from college works in Europe now and asked to stay with me for 10 days when he was here visiting. I made sure he had fresh towels every day. His first day here, he flooded my bathroom floor while taking a shower (he said he “forgot how shower curtains work”) and called for help. I quickly grabbed a towel and threw it down to wipe up the water before it seeped onto the hardwood outside the room. I immediately put the towel into the washing machine.