6 (Number)

6 is a number. 6 is a very important number, because when added to 9, it makes 15. When placed before a 9, however, that's when things get erotic. If you are a kid, look away right now! You can't see one half of sex! That's inappropriate!

Origin
One day, someone drew a 9 upside-down, and thought, "Nice." That's when 6 was born.