There was this episode of THE CAROL BURNETT where they show her being sucked down a bathtub drain. They show her slinking all through the drainpipes. I had to be three or four when I saw this. It took my parents months to even get me in a bathtub to take a bath without screaming my bloody head off. Even to this day, knowing rationally that it can’t happen, I get that weird feeling around tub drains.