you make me laugh . I see your point that it's retarded. The reason sacrifice is involved is not because of benefits to life, but benefits to emotions and what that person would consider happiness. Because of the unique emotion involved with love, they feel they can't be happy unless the person they love is safe, healthy, and happy. In some ways it is retarded. when it works, that's ok. Like I've told my husband many times; there are so many people in this world that would give anything to not have those emotions like you don't. I think you answered your own question as well. It matters because it is different for everyone. And because of it's strange and intense nature people get hung up over it. It took me, who takes love very seriously, quite a while to come to terms with my husband not being the same way. I think most people are like that. and as I said before, you can't describe color to a blind a man.