Green - An environmentalist community

We all know that baths take a ton of water, I mean you literally have to fill up a tub, and even the smallest one is pretty big. Plus, you don't need baths, plenty of people only have a shower in their house and they're fine, actually, I'd wager only a minority of people in the world, mostly Westerners, even have access to a personal bathtub.

So what do you think about taking baths (in the Western style where you drain the water after each user, not talking about public baths or hot tubs)? Do you think it's fine occasionally in order to relax? Or do you think the massive water usage is never justified? Going further, do you think new houses should be built without bathtubs, only showers?