As far as I know the body self regulates to these things. Research went into this field because of the scientifically proven effects on the sexuality of humans in periods of great distress, for example during hunger epidemics etc. Here it is proven that the sexual drive actually "shuts down", if for no other reason than lack of energy. However when the scientists started looking at people who observe celibacy for no "necessary" reasons, it turned out that after 5-6 weeks the amount of the hormones that regulate the sex drive started to decrease, to a point where apparently you don't feel the sex drive to the same degree...
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