Winter has pretty bad life. We all want to use her only for the snow (preferably for Christmas and skiing) and then to get rid of her as soon as possible. What is about Spring that we're desiring it so badly? Well... Silly question! The sun, the warmth, flowers, spring collections, girls finally showing legs and guys showing more interest than from behind scarves. Just like the ground is waking up and encouraging flower buds to grow, Spring warmth takes our clothes off and unfolds our better (human) nature.
I don't know if scientists already published the results of proper research, but we must have some solar panels under our skins (or on it???). Or, even better, what if we are walking solar batteries? We used our stock of sun rays during the winter and we just have to load our batteries again :)