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Many people, especially teenagers in gym class, are insecure about their bodies, which can make showering uncomfortable. Find some ways to become more comfortable with your own body, which will help give you the confidence to get undressed around your peers.  Get naked at home. This shouldn’t be often or for too long, but be willing to spend a little bit of time in front of a mirror with your clothes off. The only way you are going to be able to face down your doubts directly is to confront them.  Look for positive things about your body. Everyone has something they are proud of, so focus on those parts of you, and talk them up to yourself. You can also highlight areas you want to improve, but remember that you can fix those things with time and effort. Just avoid too much negative thinking, like comparing yourself to others, or believing you can’t change. One of the best ways to avoid insecurity about being naked with your peers is to minimize the amount of time that is actually occurring. Moving quickly is also helpful because you probably won't have a lot of time between the end of gym and the start of your next class. If your school’s locker room has separate stalls, close the curtain for a little extra privacy. If the showers don’t have curtains, you can bring your own curtain and shower rings for a little more privacy. If you do have a curtain to use, another thing to do is wear a towel around yourself between your locker and the shower. Take it off once you close the curtain, hang it outside. Once you are finished showering, put it back on before opening the curtain again. You don’t want other people paying attention to you while you are trying to take a shower, so make sure you are doing things that will help you blend in, and not give people something to talk about.  Don't use strong-smelling shampoos and scents. That is just another reason for people to notice or pay attention to you. Avoid talking to other people. If you don’t want people paying attention to you, don’t pay attention to them. Don’t try starting up a conversation with someone unless you really need something, like for them to move out of your way. Everyone in the locker room will be uncomfortable about getting naked, and talking to them will probably make it worse. Your focus while showering is to get yourself clean and ready for your next class. Don’t worry about what other people do or say, just make sure you are doing what you need to do.  If you are concerned about the way other people are acting toward you in the shower, tell the teacher or administrator, or your parents. You don’t have to let yourself be bullied like that.    Don’t become the bully. If your biggest fear is that other people will make fun of you, don’t compensate by making fun of them. If you wouldn’t want someone to say something to you, don’t say it to them.
Learn to get comfortable in your own skin. Get started right away. Use a curtain. Be inconspicuous. Ignore other people.