I was photographing another horse on location in a stable compound and I had to step right back and up to the door of a horse stall to get the shoot I needed. I was so focussed on what I was doing that I didn't realise there was a horse right behind me. Suddenly I felt a deep gentle breath in my ear and then a gentle nibble of my ear. I turned around to find this beautiful creature curiously engaging with me. What a lovely mare she was! So I wanted to take her portrait too, of course. And she gracefully gave me a lovely picture of her beauty, her calm dignity and gentleness. 
As with "Sheikha", I often feel that I don't take the picture, but rather that it is given to me. That is a precious thing!