The following comes to mind:
"Baby, do you love me?"
"Yes, of course, I love you."
"Why do you love me?"
"Well, you're funny, beautiful, cute, smart..."
*snore*
I have no idea. I know what love would look like but I don't know if I'm able to define it. For me, love is 100% selfless. So if we take the marriage example, if a husband loves his wife, he would do whatever is in her best interest and makes her happy and expect zero reciprocation from her. That would be love... ideally. But life for us humans is not ideal. So using the marriage example, if both the wife loves her husband and the husband loves his wife, then they would both be out trying to make each other happy all the time and giving up their "rights" to be right, to be this, and that, etc. Then there wouldn't be any arguments and no divorces and the lawyers will go broke!
lol ok, I'm day-dreaming now...