There seems to be a sweet spot for alcohol consumption that lays along a spectrum from no alcohol to enough to make things a little better to utter ruin. For instance, while most of us recognize that 75 percent of the world's sex occurs under the influence of alcohol (unofficially) because it has a way of lowering our inhibitions, there is also such a thing as "whiskey dick."
That is, you get too drunk to perform due to its sedative effect on the central nervous system, which numbs your body to external stimulus. It's the same reason you slur your speech, sway when you walk or just straight up lose consciousness.
Yet, once again, there is the sweet spot.
Studies have shown that moderate drinkers are actually 20 to 30 percent less likely to have erectile difficulties than non-drinkers. They're not sure why, it may have to do with antioxidants found in some alcohol (the same reason moderate amounts of wine protect against heart disease). Further, it appears that a small amount of alcohol can apparently "improve" a man's erection, according to one expert. We assume "improve" here means it makes it harder/bigger, rather than "adds wings and a laser beam."