Using the bathroom can be slippery business, and we mean this in the most literal sense. Unlike bathrooms in the US, bathrooms in Asia don’t usually have bathtubs. Instead, you collect water in a bucket that you pour over yourself with a smaller bucket, or use a showerhead. You could risk your life every time you step foot in and out of the bathroom.
To reduce the risk somewhat, there are plastic seats where you can sit down and take a bath/shower. This is especially helpful for tall foreigners whose heads collide with the bathroom ceiling.