Why do some sinks in toilets have two separate taps that come out on different sides of the sink? So to wash your hands, you either have to freeze them, burn them, or move them rapidly between taps, resulting in what is very much a half-burnt, half-frozen hands situation. One could, of course, find the plug, run some water, etc, etc, but by the time you’d finished all that it would be time to go to the toilet again.
Someone will be onto a winner the moment they invent a Warm tap.