España, el país que más se masturba de Europa

One study used a United States sex club to evaluate changes in testosterone levels in response to sexual stimuli in a real-world setting.
The researchers compared the salivary testosterone levels in men who participated in sexual activity with those in men who only observed. While testosterone levels increased in all the men who visited the sex club, the increase was significantly higher in those who participated.

In a 2007 study in rats, researchers found that the number of estrogen receptors was higher 24 hours after ejaculation or mating to sexual satiety. Estrogen receptors help the body use estrogen.

A different rat study from the same year found that the number of androgen receptors, which help the body use testosterone, was lower 24 hours after ejaculation or sexual satiety.

Resumen: La masturbación excesiva puede ser un gran problema.