Ever watched an advertisement for beer and wondered why the people don't just drink already? It's actually a US law that people cannot actually be shown consuming an alcoholic beverage on television! While there are countless commercials advertising their use, none have their actors consume the product.
This is for several reasons. The first is when beer ads began to be featured on televisions, prohibition was just ending, and large companies feared viewers would find the consumption of alcohol too morally challenging. Thus, they refrained from showing anyone consuming alcohol. The second reason pertains to minors. When the drinking age was raised to 21, the government worried that too many minors would be brainwashed by ads depicting younger looking people drinking beer, thus they made it illegal to show anyone drinking at all!