^ Agreed. Love - or mutual respect, or just wanting good things for yourself and another person, surely isn't defined by what what sex you want it for. Surely it's good enough just to have the wanting in your heart.
For me, love is something thats transcends self - takes you beyond your own reality to be subsumed in something other. It can relate to all manner of things - other people, younger or older, male or female. living or dead, animals or even concrete or abstract concepts like art, music and mathematics. And it may last a lifetime, or wither and die in a season.