My male tamagotchi, Paris, takes longer baths than his Kitty, my female... I just thought that was funny because I thought females were worse with things like grooming....
When your tamagotchi is taking a bath and you press any button on it, then it will stop taking a bath. Either that or different tamagotchi characters take baths for different ammounts of time. Or maybe one tamagotchi started taking a bath before the other one did.
P.S. tamagrl24, please do not argue or this topic will probably turn into a flame war and get closed.