The only reason I don ' t harp on timelines is that I ' ve seen Interstellar . While I agree with the time frame wording , I will not rule out something as completely weird as timelines . Even they could work in the realm of computer simulation because they could rewrite the past . I can ' twon ' t rule that out , but I can ' t seriously consider it without more evidence . But , I can assure you that in 11 months if that shit happens , I said it right here , right now . Keep in mind , Interstellar was also about a loop a predestination loop . <| sep |> Don ' t forget about estrogen . It is required for libido , and like dopamine and testosterone , is , contrary to popular belief , genderirrelevant in its importance to libido . This can be seen evidenced in estrogen receptor knockout mice in experiments as well as any human male who has too low or too high estrogen levels . Also it seems there was no mention of dht either . dht is an extremely potent hormone for virilization masculinizing , and has a powerful effect on one ' s libido and erections . Again , something in both men and women , and again , seemingly contrary to popular belief . Off subject , but dht is what is thought to be largely responsible for balding . You may see dht written at times as 5 dihydrotestosterone or 5 DHT . The thing that makes libido so tricky is that it is mediated by a cascade of events , and a deficiency or overabundance at different points in the body can cause an under or overactive libido . That is why there is so much variance , because there are so many points along the way to offer variance in the system . I ' ve never posted on this forum , and I expected references for everything would be required but since I ' m not seeing it in other responses I ' m going to be lazy for now and not add any and make you look things up yourself ! I take issue with the post saying Very roughly , libido is more a product of neurochemistry while erection is a product physiology . While I actually DO agree with it in the literal sense that one is , as a whole , moreso mediated by the one then the other , I feel the statement overstates the severity and importance of differentiation in this case . Show me a study showing a group of men with terrible hormone levels that still have a raging libido . Show me a study showing men taking serotonin agonists or dopamine antagonists that still have decent erections . How is a five year old supposed to understand any of these answers on this board ? Is it ' s titular purpose not to be taken literally , and more like explain this to me like I ' m twenty 5 and college educated ?