Wow, first with the lotion, then with the repetitive motion comments.
And before anyone asks, my palms are not hairy either.
But back to the leather....
You can see the same pattern in the leather in this spot, this is the upper left hand part of the steering wheel about where I put my hand most of the time.
That pattern is all the way around the wheel in, some are worse than others, and has been there since day one.
And I sit far enough back from the wheel where even if I had a belt buckle it would not touch the wheel, hell it would have to make it past my spare tire first and even that does not touch the steering wheel on the way in and out of my Camaro.