Does the shower curtain go inside or outside of the bathtub?

I don't know if you are looking for any specific person, but if your question is why should you leave the shower curtain on the inside of the tub, the answer is simple. If you leave the shower curtain on the outside of the tub and take a shower, the water that runs down the curtain will be on the floor outside of the tub and you will have a mess to clean up. But if the curtain is on the inside of the tub, the water just runs out of the tub and thee is no mess to clean up.

Conrad Hilton said it.