"Gazing dogs" evolved to be more like us
The study was measured by levels of oxytocin, a hormone which is activated by maternal-infant gaze.
After 30-minute "gazing" sessions, the hormone levels were significantly higher in both dogs' and their owners' urine. This was not true of humans and dog-raised wolves. We can extrapolate that this explains why babies are cuter than children, and dogs are always cute.