Criticism of Muhammad has existed since the 7th century, when Muhammad was decried by his non-Muslim Arab contemporaries for preaching monotheism , and by the Jewish tribes of Arabia for what they claimed were unwarranted appropriation of Biblical narratives and figures ,  vituperation of the Jewish faith ,  and proclaiming himself as " the last prophet " without performing any miracle or showing any personal requirement demanded in the Hebrew Bible to distinguish a true prophet chosen by the God of Israel from a false claimant. Modern religious    and secular     criticism of Islam       has concerned Muhammad's sincerity in claiming to be a prophet, his morality, his ownership of slaves ,   his treatment of enemies, his marriages ,  his treatment of doctrinal matters, and his alleged psychological condition. Muhammad has been accused of sadism and mercilessness —including the invasion of the Banu Qurayza tribe in Medina       —sexual relationships with slaves, and his marriage to Aisha when she was six years old,    which according to most estimates was consummated when she was nine. Many early former Muslims such as Ibn al-Rawandi , Al-Ma'arri , and Abu Isa al-Warraq were famous religious skeptics , polymaths , and philosophers that criticized Islam,  the alleged authority and reliability of the Qu'ran ,  Muhammad's morality,  and his claims to be a prophet.
Criticism of Muhammad
Islam has a long tradition of explicit sexual discussion | Aeon Essays
For whom is sex more pleasurable, men or women? And if you had to, which would you forgo for a year, sex — or bacon? The answers depend not only on whom you ask, but also on what you mean exactly by sex and how you feel about bacon. To explore these questions, I consulted two dependable sources: modern science and Greek mythology. Some time later, Zeus and Hera asked Tiresias to settle a dispute over the question of who had more pleasure during sex.
Sexual slavery in Islam
Muhammad slept with her without any ceremony, which caused uproar among his wives and finally was settled by Divine intervention. This story is recorded in an authenticated Hadith and is reported by Omar. This Hadith is describing the reason for the revelation of verse 4 of the Qur'an. The verse says:.
Classical Islamic law allowed men to have sexual intercourse with their female slaves. Many female slaves became concubines to their owners and bore their children. Others were just used for sex before being transferred. The allowance for men to use contraception with female slaves assisted in thwarting unwanted pregnancies.