Medieval Christian polemic mocked Muslim sexual mores to discredit the Koran

Evidence

But it is Muslim sexual mores, once again, that become the favorite target for the polemicists’ ridicule. Both authors dwell on Muhammad’s marriage with Zaynab, and the Koranic revelation said to have validated it; for both, this is proof that the Koran, far from being divinely inspired, is manipulated by Muhammad to serve his own base desires. The Liber denudationis dwells on the supposedly sordid details of Muhammad’s other marriages. The Liber denudationis (like the Risâlat al-Kindî and al-Qûtî) attacks Muslim divorce law, which allows a man to remarry the wife he has divorced only after she has had sexual intercourse with another man. And all these texts ridicule the Muslim idea of heaven, dwelling on the sexual delights that Muhammad promised there. The Liber denudationis even goes so far as to claim that Muslims believe that in the next life each Muslim in paradise will be awarded for his virtue by an elongation of his penis: it will be so long, in fact, that he will need seventy Christians and seventy Jews to carry it before him! — John V. Tolan, Saracens, 820

Categorization

• XREF: Direct genealogical root for the modern trope of Muslim ‘sexual depravity’ — hypersexuality, polygamy, heavenly virgins — that vault claims from Anidjar/Aziz on Islamophobia already gesture at. This passage shows the absurd-ridicule register of the medieval prototype that later Orientalist writing inherits.
• ADDENDUM: Relevant to the existing immodesty/moral-panic article — the sexual-ridicule trope here is the anti-Muslim counterpart to the silk-dress ‘immodesty’ panic content already mapped.