In the Thai bathroom, different functions are not compartmentalized. The shower is right over the toilet, or, you could say that the toilet is in the middle of the shower. The water goes down a hole in the corner of the room. Everything gets wet all the time, so when you go into the hawng nam to wash your hands or anything, you're going to come out with wet feet. Smart, upwardly mobile Thais in the know like to eat at a table, but many people still prefer to spread things out and sit down on the floor and eat.
Chairs are for farangs, who are too stiff to sit on the floor.
When I first came to Bangkok, I was amazed to see the girls who worked at my guesthouse sleeping on the hard floor. They also ate on the floor. They didn't seem to want it any other way. I can't help but compare this to the USA, where people are encouraged to feel that they need to have all kinds of gadgets and comforts in order to be happy. I like a simple life, where I can do what I want and not be bothered.