I've got a leather sofa and recliner that match and then a cloth recliner and a couple of chairs that just coordinate. My leather pieces feel cool year around and we've never stuck to either.
Yeah, I don't get this either. I don't have leather furniture, but my parents have a leather recliner, and I've never stuck to it. Maybe because they don't let the house get hot? I guess if you didn't use a/c it could be an issue.