They produce sperm and they secrete hormones (testosterone)
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I think you should go to a chiropractic or tell somebody or go to the doctor if ur young I suggest telling your parents
Well you dont have any following statements for me to answer, i can say one thing, weight and energy are the same because depending on if you are going to gain or lose weight, loseing weight causes more energy usage out of you and if you are gonna lay off and gain weight, it causes less energy being used out of you, energy depends on the weight
9 weeks is the answer ik health :D