The Lines of palm are not visible. Just giving you a reading based upon his thumb
The thumb is tapered and bends back backward at the end indicating that he is a perfectionist. He is never satisfied. He also loves to experiment. Such people love to be in different circumstances and can mold themselves very well. They also tend to get bored very easily as changes turns them on. Experimenting helps them to constantly look for changes. He must be having love for variety of taste. The bending backward gives love for change and tapering gives refinement He must be having a refined taste in all sphere of life.
Internet for the photo. I will like to thanks you for the image.