who masturbate have better health, improved immune system function and a lower risk of suffering from infections. Various studies have shown that individuals who experience a greater number of orgasms have higher levels of immunoglobin A (IgA), which is the first line of defense against colds and flu. A (IgA) is also an indicator of the strength of our immune system. Research from 2004 led by Philip Haake of the University of Essen (Germany) showed that arousal and orgasm after masturbation activate various components of the innate immune system. "In men, the fact that the seminal duct and ejaculatory ducts circulate semen outward prevents infections from external opportunistic bacteria from occurring," says Rosselló.