Is exercise in gym affects the production of sperm or affects the sperm count? How to make curved penis straight?

Maybe... It sounds as if you may have " peyronies" disease. See a urologist but there may not be much you can do. Surgery may be an option. As far as sperm count, if your concerned it is low, also see a urologist and get that checked. Exercise does great things for us and there are strategies to increase sperm count. Good luck.