I hate to break it to you, but the honest answer is over 50% of college sexual assaults involve alcohol. The number I have seen varies between 68-99%. It can be pretty difficult though to measure accurately, especially when you depend so heavily on respondents’ memories and honesty. And I will admit that I have personally met at least one woman who told me a story about her own assault while drinking heavily herself. (Tears rolled down my face when she told me this). Basically, the responsibility also falls on us as individuals who are choosing to drink alcoholic beverages. One thing we can do is take steps like not leaving drinks unattended even for just moments before more alcohol or topping off someone’s cup with water if they