question: is black spots occurs due to over masturbation? / size of penis is reduced due to over masturbation  i am in this act from the age of 15 year. my sperms is getting dilute. my dick is not straight at the time of raising it & size is 5" only which is i think too small. Is the problem of STD can occurs due to above.Is this serious problem? can i get alright in future and get my sex power back