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[Reference book for this issue????] Logical sex for couples who want to have an orgasm: Illustrated guide Kindle edition by Yuki Ushiyama (author) Kodansha (editor) https://amzn.to/3HI5icW [Table of contents????] 00:00 Introduction 01:10 ① Knowing women's sexuality 04:57 ② How to make a woman feel good 08:15 ③ Important things about sex 11:52 Summary