*takes another piece*
This one has one big hole - again for the torso - and three smaller holes for arms and neck. You put it on like this. *demonstrates*
Now this is called underwear because you wear it below what you want to display. The underwear is just meant to provide some basic protection against cold, too much sun, tiny injuries and some biting insects. And above your underwear, you can have other clothes for additional protection and for fashion reasons.
*shrugs* Some people have fun presenting themselves differently every day. Thus, they are choosing different clothes in different colors and shapes and in different combinations each time.
*points at the wardrobe* Judging from its size, you can wear something new everyday for almost a year!
So, one year consists of a set of four subsequent seasons, one of each type. Let's say, you spend spring, summer, autumn and winter here, one of each, you can say you spent one year here.
*gets out some shirt* You put it on like this. *demonstrates* You can have some with long sleeves that cover your whole arms or with short sleeves if it's a warm day.