What Are The Bad Effects Of Masturbation?

yh , just i wanna know how many times it is must be doing with out get to health problems ??? , and it is really dangerous and at the same time get very shy when they wanna ask their parents and some of them thinks that their parents will lie and say it is deadly dangerous in order to make them stop especially in teenager it becomes very embarrasing to ask , and is going to reduce my sexul habbits when i get married ? and does it cause aids ?