Dr. Sawyer: Unless you’re feeding your boyfriend intravenous alcohol, no, it’s nothing you’re doing. He’s suffering from erectile dysfunction, better known as brewer’s droop, or whiskey dick. Alcohol is a nervous system depressant and men can quickly go from feeling like a God who can go all night, to the owner of a limp, useless and totally uncooperative penis within seconds. Want to avoid this? Get the guy to cut down on the booze.