Excellent point. My piece was a 2am oversimplified word vomit of some thoughts I was mulling over. I was thinking of selfish at the literal cellular level, but I agree that it’s not that simple.
There is differentiation between the types of feelings, too, that I didn’t address.
I agree that we have developed the biofeedback loops you have described with your puppy. Good stuff.
There’s much more to love than I could fit here. My only (sloppily made) point was that love requires both feelings and action and that while the actions are most important, the feelings serve an important function, too.