At Maryland’s famous Benji’s Drive-In Movie Theater last weekend, my family and some friends enjoyed an evening playing outside, eating popcorn and candy, and watching a new film out in the great open air.About an hour in, though, my buddy started to look uncomfortable. “I’m covered in mosquito bites,” he told me. “Aren’t you?”I looked at our arms side by side, only to realize that he had several red, itchy welts, but I had not a single one.Was this just dumb luck? Or is there science behind which of us the mosquitoes prefer?