NU Sex Week, which runs from Apr 11 to Apr 15 this year, is a week of events with various speakers or workshops talking about things in the world that impact how you think about sex and how you have sex. Castle said their next step is to work closely with the school administrators to make the course more well-known among Northwestern students who have already been exposed to the social side of sex education. And that is only one step in working towards creating an effective and comprehensive sex education culture at Northwestern that not only covers consent and sexual assault, but also the science of sexual health education. Students pointed out that the main focus of the ENU is consent, such as what qualifies as sexual assault, instead of sexual health education, which focuses on anatomy and biological processes. And most students have issues beyond sex, like changing menstrual cycle lengths and questions about exercise and testosterone levels. Next, a woman took her clothes off, and—with an audience of around —lay down on her back, legs spread. Late Wednesday, he posted a lengthy explanation of his behavior to the Northwestern faculty site, in which he acknowledges he had "some apprehension" about the display—though more for the personal repercussions than any lack of educational value. The underlying purpose of the Sex program is to provide a biological framework for the social aspect of sex education that Northwestern is already doing, said Megan Castle, who assisted in developing the curriculum content of Introduction to Reproduction. The class, which launched Monday, will discuss topics such as the link between beer drinking and erectile dysfunction, changes in young woman's menstrual cycles and pregnancy. For example, alcohol can have a profound effect on erectile dysfunction, which can be perplexing to a young man if he is not aware of the cause. On Saturday morning, the professor behind the controversial class issued his own apology stating that he regrets allowing the controversial demonstration, and that "In the 18 years I have taught this course, nothing like the demonstration at issue has occurred, and I will allow nothing like it to happen again. They need to know because it impacts their health. Students who have not heard about the Coursera course also think that it should work on marketing.