The Consequences of Excessive Mastrbation , Bad/normal/Good ? Hey Everyone , first of all , please who'd ever responce , keep it scintific only plz.

Im almost 20 years old male , and i keep on mastrbating since i was 10 years old , at least everyday once and sometimes 2 or 3 , also have alot of safe sex with so many girls , when i try to stop the mastrbation or sex for more than 3 days . my skin starts to get alittle red and i feel like crazy with bad mood.

My erriction is fine , wasnt effected by the Excessive daily process , also the ejection process is perfect. But ...

it seems like i started to have a very short-term focus conditions , feeling so sleepy and tired all the time , short sight and short-term memory too .

i've been doing alot of researches but i came out with so many results , ones say its percect to prevent prostate cancer ,and it has nothing to do with such symptoms i have .
and in some other sites they say that it has everything to do with it ,and it could also leads to blindness , 
please anyone reply iwht info

Summarized question: Are there any side effects from excessive masturbation?