Although oral sex is not explicitly listed among the prohibited acts in the Qur’an and the Sunnah, it is considered objectionable due to its contradiction with sound human nature (fitra). Therefore, while it may not be definitively classified as haram, there is little doubt that it should at least be regarded as makruh (discouraged). Acts that are makruh, like those that are haram, are to be avoided.
The sexual organs are also parts of the body associated with excretion and are therefore regarded as impure areas. During sexual activity, fluids such as semen and pre-ejaculate are released. Bringing the mouth into contact with these areas and substances is considered both harmful to health and morally inappropriate, and it conflicts with a sound human disposition.
Human beings have been created with dignity (Qur’an, Al-Isra 17:70). Pure and wholesome things have been made lawful for them, while impure and repulsive things have been prohibited (Qur’an, Al-A‘raf 7:157). Going further and claiming that acts such as oral ejaculation and the ingestion of such bodily fluids are permissible is not acceptable. Consuming such fluids is considered prohibited, as ingesting parts or waste products of another human body is forbidden (see Zayla‘i, Tabyin al-Haqa’iq, 2/183; Haskafi, ad-Durr al-Mukhtar, p. 202).
While seeking worldly pleasure is natural, there exists a broad and appropriate framework within which it can be pursued in a dignified and human manner. Resorting to such practices, which are viewed as contrary to human dignity, can be seen as a departure from noble human nature toward a lower level of conduct.
Moreover, such behaviors may conflict with human dignity and can, over time, damage the mutual respect between spouses. Spouses are not merely objects of sexual gratification; mutual respect is essential for a healthy marriage. In particular, it is absolutely impermissible to force one’s spouse into such acts against their will.