I don't drink alcohol nor do I use drugs, but I was sexually abused as a child and I was raped a few months ago. I think they are related in my case because of weakness in personality. As a child being sexually abused repeatedly makes for a submissiveness personality although there is hatred toward the action being performed.
People who have been sexually abused allow people to take advantage of them, which I think has a huge factor in rape. A lot of people take advantage of the weak hearted, whether it's sexually or physically or mentally. Although I definitely said no and stop 100's of times I was still taken advantage of, like when I was little.
drugs and alcohol may lead to the correlation in other people's lives but thankfully not mine.