The first reason is ignorance of the clitoris, fueled by our sex education system. Best-selling author Peggy Orenstein pointed out that sex education ignores the clitoris, teaching only about women's internal organs. No wonder a study found that over 60 percent of college students falsely believe the clitoris is located inside the vaginal canal. Many of these students also mistakenly believe that women orgasm from intercourse alone. In actuality, only a minority can. Depending on the way the questions are worded, 15 percent to 30 percent of women say they orgasm from intercourse alone. When I ask students, "What is your most reliable route to orgasm?," 4 percent answer penetration alone.