The shared house I once lived in, had one for so long we christened it Norman and finally got rid of him with a sharp stick and a good long flush. Took nearly 4 days for him to go though.. just when you thought it was safe, he'd pop his end back round the U-bend.....

No-one ever did own up from the other two... I know it wasn't me, I was vegetarian at that time.

LTS