You're in a restaurant lavatory and dip your hands under the faucet when you suddenly feel the brush of a cold hard surface as your hands hit the back of the sink. I hate that feeling. It seems gross to me and makes me attempt to wash my hands that much more thoroughly. Yet again, I have found myself trying to wash my hands in a sink where the faucet has been placed too far back in relative position. It doesn't happen often, but I do see it more than I think I should. Maybe I am hyper observant, or perhaps I have ginormous hands. I am doubtful on both. I do believe, though, that there should be a standard minimum distance between the flow of faucet water and the back of a sink.