I don't bathe if i don't feel i "need" a bath.
Sometimes, usually during the weekends, I'll skip my bath. Sure, I'll wash the essentials, but legs, arms, etc? Nope. So long as I don't smell I don't see why I should.
Don't get me wrong, I'm not a dirty person. I like keeping myself looking good. But if I feel clean enough, especially if I'm not going anywhere, I don't bother with a shower.
Anyone else out there do this?