No, they just wear them because they're CRAZY!! They also go to the football stadium on a weakly basis in the winter to volunteer to hand-shovel out the stands when there is a home game.
Those cheese heads, they're dedicated but totally nuts!! I know, I'm married to one:).
We never had a summer here either in upper Illinois. Right now it's 59 degrees out and I'm wearing a sweat suit over my shorts and tshirt. This is what the whole summer was like. The dogs hate it. I never put away their winter blankets used in the family room (of course they have to be covered from head to toe if a good nap can be accomplished).:D I'm washing the winter bed quilt as we speak so they stop laying on top of me for the warmth at night.:p