Because you are taking things that don't belong to you without asking.
In my opinion, they build pleasant expectations bout alcohol by always showing people having a good time by consuming it. You never see an alcohol commercial where the people are not enjoying themselves.
This can affect younger people because when they see on TV that it does no harm to the adults, they think it won't do anything to them. They are going to want to try it, because all they see is people having a good time while drinking.
Hope this helps!
Body composition is important because a normal balance of body fat is associated with good health and longevity. Excess fat in relation to lean body mass, known as altered body composition, can greatly increase your risks to cardiovascular dis- ease, diabetes, and more.