Andrew Huberman· PhD
in males, it's interesting to point out that testosterone is promoting seeking of sex, but it's also estrogen in males that's important for libido, if estrogen levels are brought too low, then men will completely lose their libido, this is often not discussed or overlooked in the discussion about testosterone therapy and performance-enhancing drugs, people think that hyperandrogenized individuals, meaning people that have very high levels of androgen will have very high levels of libido, and they will, provided estrogen is available in sufficient ratios to match that testosterone, so it's not simply the case that high levels of testosterone produce a lot of sex and mating behavior and low levels of estrogen are good across the board, you actually need both in both males and females, it's just that in females, the testosterone levels are always going to be lower than the estrogen levels, and in males, the estrogen levels are always going to be lower than testosterone levels, so testosterone promotes sex-seeking behavior, and the real question then is, does sex itself promote testosterone?