Sex can be quite the controversial topic in society. While we all partake in the act of sex at one point or another, there are a lot of things about human sexuality overall that we seriously don’t know or understand – unless, of course, we take a course or two in college (worth it, so worth it). High school sex ed won’t tell you more than wrapping your Willie and hey, don’t get an STD. When we start having sex frequently, we learn about the act itself. But, there are tons of things to know about human sexuality – how humans operate and why – that we can learn. Do you think you know it all? Well, here’s your shot.