I’m all for exposing one’s self to bacteria and other such noxious items to keep the immune system healthy, but I’ve always thought that taking a bath is a pretty disgusting proposition. Essentially you are laying and soaking in your own filth, and the filth of others before you (even if it was cleaned before you jump in.) A bath also uses more water than your average shower. Just another line item of evidence that I spend a little too much time analyzing stupid things. 
Anyhow, here is yet another reason I have no desire to take a bath over a shower.
What doesn’t kill you only makes you stronger.