I for one have never had a problem with static in leather furniture. If you are having problems with static electricity, I’m almost willing to bet it’s a problem with your carpeting or wool socks and NOT with your leather furniture!
Food for thought.
This static electricity is a usual problem and I agree that it is most of the times because of one’s clothes; but important to mention that the quality of leather also does matter.
A great way to get rid of static electricity is with fabreeze. Interesting way to deal with it, but it works!