Dave often employs the strategy below when he wants to feel cool, temperature-wise. (He always feels cool personality-wise, as you likely know.) Thus, the sight below is usually one for the summer. However, Dave will occasionally unleash this strategy in the winter months as well.
There are a number of reasons for this. First of all, Dave's home is climate-controlled, so even in the winter it is not particularly cold. But second of all, and more importantly, Dave doesn't want to get out of practice. He knows how important this strategy is to him every summer, and he won't have any time to practice come July. A failure then could be nothing short of devastating, so he keeps himself in good shape year-round to avoid such a failure.
Here is the strategy from another angle.