Love. 

You Don't make a photograph just with a camera. You bring to the act of photography all the pictures you have seen, the books you have read, the music you have heard. The people you have loved. - Ansel Adams

I believe that love is love. It doesn't matter to me who you love or why. What matters to me is capturing the love you have for eachother, and capturing it in a way that you will never have to explain with words.