ah ha these are brilliant! Gonna throw my tuppence in...

Ok, as with all brotherly older siblings they like to play a joke. My brother told me when i was young that if i sat down on the toilet seat when weeing then a rat could come up and bite by bum and I'd die, and that it had happened to lots of people! i spent years (and i mean years) trying to not sit down whilst weeing, but also craning my head to look down the toilet seat incase i saw a rat and pee'd on it! Not sure if you've ever tried it (no idea why you would) but its really awkward!

Yeah thanks for that one dearest brother of mine!