As far as universities, I can think of a few possibilities.
More well off people in general are more entitled.
Alcohol, especially in mixed groups - it's really well established that alcohol is implicated in a lot of sexual assaults. The drinking culture among university students often not healthy and will exacerbate this.
When I worked as a student at a women's residence, it was notable to me that many of the young female students didn't see any need for precautions, for example when going out with male students to their rooms or drinking, even when they really didn't know them. They didn't feel they should stay in public places, or tell a roommate when to expect them back. More savvy women are often more cautious, but this is a young population that's often been relatively protected by their social/economic situation and parents. They are also often less likely to try and extricate themselves early on from a situation, or have a firm sense of their own boundaries, or even to see when someone is a creep. All of this means they are less likely to avoid dangerous situations.
Something of a generalization, but when you are looking at things like trades training, there is still something more of a sex split, where some areas like heavy trades are mostly men, and some like office work are very female dominated. So you don't get quite the same sense of all hanging out as buddies in a mixed sex group.