When you move into a new place and notice you have a hot neighbor, it takes you just seconds to wonder if they’re available and, if they are, you start plotting just how long you should wait until you go over and ask for a cup of sugar (and of course you’re thinking “is that even a real thing or just a sitcom move?”) But what is it about the “girl/boy next door” that’s really that desirable? On paper, dating …