Your all screwed, without electricity, your PC ain't gonna work for long, unless you've got some sort of Carlos Fandango solar / wind power system going on.
Shesh Tristan lighten up dude, I don't think he meant "what CAN'T you live without" in the true sense of the statement, more the metaphorical sense of the question.
Oh yeah, and the idea of you living without clothing is NOT the kind of image I needed in my head this afternoon, thanks man.
Wife: No u end up killing it because it nags to much
PC: No, u end up killing it cause it won't connect to the internet
Car: No, u end up killing it cause fuel will dry out
Food: Yes, if there is none it might end up killing you
Water: Yes, """""""""""""""""""""""""""""""""""""""""""""""""""""
Blow up Doll: Yes, it always smiles and never nags
Watercycle: Yes, then you can go from island to island