An elephant uses a specially made toilet!
Whatever you call it - toilet, loo, bog - when you've got to go, you've really got to go.
So to celebrate the usefulness of the good old lavatory, Newsround Online has come up with a list of amazing toilet facts and figures.
And here's out top tip: print this out and read it at your convenience - ha!
The average person spends three years of their life on the loo
Researchers have found that girls really do take longer to spend a penny than boys
The average person visits the toilet 2,500 times a year - about six to eight times a day
The first time there were separate male and female toilets were at a posh party in Paris in 1739
Here are some words used for the loo: powder room, lavatory, outhouse, ladies, convenience, washroom, men's room, bathroom, dunny, bog, khazi, gents, garderobe, necessary, women's room, restroom, potty, privy, the smallest room, cloakroom, latrine, place of easement, water closet (WC), john, can, little girls' room, little boys' room, throne room, facilities
In China there are public toilets for dogs
The first toilet cubicle in a public washroom is the least likely to be used: it is also the cleanest
Most toilets flush in the key of E flat
World Toilet Day takes place on 19 November each year
The first toilet paper was developed in England in 1880 and sold not on a roll, but as individual sheets in a box
Arthur Giblin was the inventor of the first flushable toilet
The average toilet is flushed eight times a day
We use an average of 57 sheets of toilet paper a day!