Why you should always keep your bathtub clean.

When you come home from work exhausted and achy, you just want to climb in bed. You can't, though, because you're covered in flour and oil and sweat, and it would just mean you'd have to wash the sheets when you get up, and you can't be bothered to do that much more work. So you want to take a shower first, but you're too tired to stand up and do it. Doesn't matter, because if your tub's clean, you can pretend you're taking a bath, only with the shower running instead. Works for me. Several times a month, in fact.