Masturbation is a natural exercise and do not has any kind of side effect if it is done in a controlled manner but excessive hand practice has many kind of side effects on male health and sexual performance as follows:
a) Lower Back Pain
b) Chronic Fatigue
c) Concentration, Memory Problems, and Absentmindedness
d) Hair Loss (or thinning hair)
e) Weak Erections
f) Pain (in the testicles, groin, or pelvis)
g) Eye Floaters (or fussy vision)
h) Seminal leakage
i) Erectile dysfunction
j) Bent mal...
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