When I turned 18, I got a gillette mach 3 in the mail from the air force I think. I opened it up in front of my parents, and my dad says "ooh, nice razor! I'm going to do to that one what you do with mine!" and before he could finish his sentence, I said "noo! Don't shave your balls with my razor!" and before he could think, he laughingly said "no, I mean beat it on the sink until the blades are all crooked!"   About 10 minutes of my mom giggling and my dad realized what I said, but I was out the door. It never came up again.