Why does my butt smell so bad, and causes my whole body to stink?

I know that peoples' rear ends stink. its just the way it is. but with me, mine smells so bad that I think its whats causing myself to smell horrible in general. not to be too descriptive, but i clean my entire body and shower daily, and lately have been washing that area with A LOT of soap...but it still stinks. if anyone has dealt with this sort of problem, or could offer some insight as to what i can do about it (it's pretty embarrassing!) I'd much appreciate it.

also, I've been getting a lot of "swamp ***" lately (where the boxers become sweaty) and I think this could be a factor. its happening not only when im running around and being active, but just while i sit in the classroom. why? and what can i do?

thanks! (im a 17 year old male btw)