It’s no secret that many college students spend much of their four years at school drinking way more than they probably should. Now, a new study is actually putting a number on the plethora of unfortunate consequences that comes from a wild night of college drinking.

Over four years, researchers say the average college student deals with 102 alcohol-related consequences the morning after. These range from blacking out, suffering a hangover, being pressured to have sex with someone, or having to miss work or class because they drank too much the night before.

However, the team found one major factor keeps many students from overdoing it at a college party—strict, disapproving parents. Researchers say college students who thought their parents would disapprove of their alcohol-related dilemmas ended up reporting fewer negative incidents after drinking than their peers who partied harder.

Research professor Kimberly Mallet said, “Kids really look to their parents for guidance in a lot of ways even if they don’t outwardly say it. It’s empowering for parents to know that they can make a difference. We often think of peers as having an influence on drinking behaviors, but we found that parents can make a difference, even after their child has left home.”