Kurtosis, what do you think about this article? From steadyhealth.com:
So, what about effects of over-masturbation?
Sperm contains DNA, which is carrier of the heredity genetic code, and RNA which contains enzymes, proteins, glucosides, lecithin, calcium, phosphorus, biological salts, testosterone, etc. However, the sperm is by far not the only substance in our body that contains DNA and RNA. When ejaculation is carried out, a very small percentage of this components (enzymes, proteins, glucosides, lecithin, calcium, phosphorus, biological salts, testosterone) are eliminated from the body. For example, when extracting calcium from the body one could cause him/ herself fatigue and pain in the bones. But we all know calcium (and all other components) are easily substituted with food. Actually, it is normal to extract 'old' components and replace them with new ones.
Over-masturbation, or more accurately said over-ejaculation stimulates parasympathetic nervous functions, which results in the over production of sex hormones: acetylcholine, dopamine and serotonin. Abnormally high levels of sex hormones cause brain and adrenal glands to perform excessive dopamine-norepinephrine-epinephrine conversion. In other words: there is a big change of body chemistry when man or woman practices over-masturbation.
Hmm... is something wrong with body chemistry? Well, actually not- if there is balance. But if there is no balance, some other symptoms might occur. We are still talking about over-masturbation, not just masturbation!
Another source points out that people who over-masturbate could experience problems with concentration and memory, which is supposedly a clear sign of “being over drained of acetylcholine”. According to some sources
over-masturbating can also drain the motor nerves, neuro-muscular endings, and tissues of acetylcholine and replace it with too much stress adrenalin which is where absentmindedness, memory loss, lack of concentration, and eye floaters come from.