This is normal for someone your age. Puberty can be a difficult time for kids. The penis can get erect at the most inconvenient of times. You need to think non-sexual thoughts when you take your bath. Try not looking at the flesh of the others also. This can be very difficult because you are all curious especially with penis size. There is not much else other than pinching yourself that may work. Other than that try not having baths with the others.
I'm doing research on that right now in school and so far I have found they are really into "football" aka soccer. They also have been to the Olympics in swimming and other sports. Hope this gives you some help.
Like any other type of school sport quality's varies from school to school, some (like the one I am going to) offer no sports at a high school level, though others offer sports of varing levels of quality. Though you have to remember that magnet schools primary focus is not sports and there for you are likely to not find much emphisis on sports.
because they will kill each other
Golf!!!!
Every school in the United Kingdom has to offer a sports program, not so sure about the United States and any other country
It can if you don't apply yourself. If you workat your homework instead of goofing off, you can easily have sports as well. You just have to decide that sports and school come first, and other play-time has to be later.
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It really depends. All children and youth need vigorous physical activity and sports provide the benefits of exercise and the potential for acquiring a sense of accomplishment. On the other hand, practices and games can rob you from doing your schoolwork. Doing sports may be a distraction from school and keeping a balance between grades and sports can cause stress. Late practices can cut study time and team traveling can make you fall behind in class.
An argument can be made that school hours should not be changed because of sports practice and other after school activities.
Sport is an action that you can do it by yourself. It has it's own verb, like to swim or to run. Actually for sports, it is "doing sports" not playing. On the other hand Playing is for games, like to play football, to play tennis, that you cannot do it by yourself.
where there is more money going to other class
Other than high school and college sports (which are most of them), the Connecticut Sun (WNBA) is one of the few.