A study at Boston State Hospital proved that ultraviolet light increases the level of testosterone by 120% when the chest or back is exposed to sunlight. The hormone, however, increases by a whopping 200% when genital skin is exposed to the sun! Regular sunbathing increases the strength and size of all muscle groups in the male physique. The combination of sun and exercise is, therefore, ideal to develop a strong and healthy body with optimal reproductive abilities.
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