Let me get this straight — I’m going to spend two years going to Mars and back, while crappin’ and peein’ in a tube, AND probably not getting laid (definitely, since there’s no way to lay anything in microgravity) — and all I get to eat is salad?
Well u can count me out, don’t like peein in a tube, don’t like not getting laid, and definitely don’t like salad!

(Actually, I've thought for a while if NASA is going to send men and women on multiyear voyages, they're going to have to deal with the sex in space issue.)