Is it too much, or would it pressure people too much if hunger & sleep was implemented, along with "needs", such as peeing or shitting...?

Surely the creatures have the ability to pee/shit/getting hungry?

Imagine the following.. You fight a bad-ass boss, and things are going very well for you and your team. However, you need to take a dump. So, your focus goes down, constantly, and as a result, you won't do as well as you normally would.

Is this on the way into MMOs? What do you think? Would MMOs get better from including things such as hunger, and the other "needs"? Would hunters who kill creatures/farm crops actually pay a much more important role in that case?

Discuss! - What do you think, would MMOs get better from such things as these?

While we're at it - is there anything you'd like to see from the real world implemented into MMOs which seems to be oddly missing from it?