<s>[INST] How does obesity reduce sexual function or fertility in a male? [/INST] Fat in a person with obesity can reduce the testosterone or male hormone levels in a male. Reduction in testosterone can reduce desire for sexual function. Excess fat can give rise to what is called pseudo hypogonadism or in drawing of the genital organ because of excess fat. Even the temperature change in the scrotum can reduce the quality of sperm and reproduction of sperm thereby reducing fertility in a male thus sexual dysfunction is seen both in males and females which is not commonly known to most people Source: LOC. Link: https://obesityasia.com/faqs/. Field: Endocrinology. Disease: Obesity </s>