First,
Being willfully ignorant—in college!—of human sexuality is not only silly, it's antithetical to the aims of Mormondom. It's not a religion that condemns either the body or sex as bad or less-than. If you're getting turned on by clinical terms like "Vas Deferens" or "plateau phase," that's a little weird.
I had fun searching the BYU catalog for "sexuality," and more courses are offered than you might think. "Sexuality Education in the Curriculum." "Strengthening Marriage." "Sexuality and Public Policy." It may seem like Utah County is post-Revolution Iran, but it's not. As an English minor, we also read a fair amount of sexually-charged material, and that's at the Church school.
Knowing about the reproductive system, at the very least, is of the utmost importance to any adult. When you choose to become sexually active, knowing something about male and female sex organs will make the whole thing less terrifying. In the meantime, should you choose to abstain, understanding your own sexual drive can help you avoid "temptation," if that's how you frame it. (Seeing the effects of liver cancer can make you go teetotal way faster than any Sunday School lesson.)
I read that as lust having a greater effect when you're ignorant. I think she should take the class!