Wear some socks, wimp.
I dispute this. >: (
(Take this lightly, I'm just idly ranting.)
Socks and smelly feet are not a substitute for a national failure to designate sensible "single" bed sizes. I am 6"2, a standard single bed is 6"3. If I was to lie with my toes pointed up or down and flat against the end of the bed (which would lift up the equally insufficient covers and cause a draft), I would have a single inch to avoid head bumpage.
I used to sleep diagonally across a double bed to avoid this problem, and now sleep in a non standard longer single bed, for which it's far too hard to find correctly sized sheets for. I demand a revolution.