https://www.healthline.com/health/healthy-sex/small-penis-sex
https://www.amazon.com/Best-Lover-Ever-Monogamous-Relationship/dp/0692158987/ref=mp_s_a_1_3?dchild=1&keywords=how+to+be+a+good+sexual+partner+book&qid=1607127749&s=books&sr=1-3
https://www.amazon.com/Joy-Sex-Ultimate-Revised/dp/0307587789
https://www.amazon.com/Hite-Report-National-Female-Sexuality/dp/1583225692
https://www.amazon.com/Field-Guide-CKING-Hands-Getting/dp/1592335098