The perfect scenario: Your a brides maid going from the cocktail party to the reception with the bridal party and it's a long drive, your in the limo and your desperate to pee and you won't be able to hold it until you get to the reception and the limo driver can't stop. What happens next ? And in reality how many times do you think this has actually happened. I would say a lot.
Maybe Dave can do a scenario like this. It would be a great roadside wetting.