Alcohol, Drugs affect erection?
Intense alcohol consumption has also been linked to decreased testosterone production. For a long time, large amounts of alcohol can reduce your sexual drive
It is recommended that the average adult man take two or fewer alcoholic beverages daily or no more than 14 units of alcohol per week on a regular basis.
In addition to alcohol, the use of tobacco, marijuana and illicit drugs such as opiates has also been linked to reduced testosterone production. This can lead to a lack of sexual desire.