Is it true that POLO sport can only be played right handed?

December 30, 2009 1:40am CST
I was talking to a friend of mine about the advantages some left handed or left footed players have in their respective sports when he told me that polo could only be played with the right hand. He told me that the right hand is used to hold the stick to strike the ball, while the left hand is used to ride the pony. I'll actually be doing some research on this but do you people know of any other sport where only the right or the left hand is used exclusively?