POPSUGAR Love Textbook Perverted Math Textbook Some Perv Wrote a Textbook by GiggleSugar 3/06/08 5 Shares Like us on Facebook Sign up for our daily newsletter > What about the angle at which she lifts her heel and rams it into his shin? Thanks, College Humor! Read More TextbookSchool HumorSexy HumorPervertJapanMathHumorSchool POPSUGAR, the #1 independent media and technology company for women. Where more than 75 million women go for original, inspirational content that feeds their passions and interests. Get inspired with our daily newsletter Food Home Tech DIY Vegetarian Love and Sex Sign up with By signing up, I agree to the Terms and to receive emails from POPSUGAR. xChantilly 7 years Um, why is it tagged with "Japan?" The words are in Korean. k-squared 7 years Pythagorean theorem for the perverse, hah.