In Islam, oral sex between a husband and a wife is considered “Makruh Tahrimi” or highly undesirable by some Islamic jurists when the act is defined as the mouth and the tongue coming in contact with the genitals. The reason behind considering this act as not recommended is manifold, the foremost being the issues of modesty, purification (Taharat) and cleanliness.
The most common argument states that the mouth and tongue are used for the recitation of the Qur’an and for the remembrance of Allah (Dhikr). Firstly, scholars consider touching genitals by mouth as discouraged mentioning the reason that, touching genitals by the right hand rather than the left hand has been prohibited by Prophet Muhammad (SAW); as in their opinion, the mouth is comparatively more honorable than the right hand, for that; touching genitals with the mouth is more abhorrent and vacatably excluded. Secondly, the status of genital secretions is debated among the four Sunni schools, some scholars viewing it as impure and others not.
There are differences of opinion in this topic. Many scholars believe that oral sex is permissible, but it is disliked. The group of scholars who view oral-genital contact as permissible is mostly because there is no clear command in Hadith and Qur’an prohibiting such act. Prominent Muslim scholars like Yusuf al-Qaradawi share this view. At the same time, there is no mentioning of such act as a part of foreplay in Hadith although Islam stresses on the importance of foreplay, as kissing, touching and the like are explicitly mentioned in Hadith.
Sexual intercourse has to be avoided unless foreplay takes place according to Sunnah. Rasul (SAW) forbade acting like an animal with one’s wife which indicates sexual intercourse without foreplay. The husband is also responsible for satisfying the wife’s needs (i.e. bringing her to an orgasm) as part of a healthy marriage and to ensure the right of the wife. During foreplay and intercourse, the husband is allowed to take pleasure from the wife’s breast, in Hanafi school of thought it is permissible as long as no secretion (i.e. milk) is consumed during this act. However, the majority of the scholars, including from Hanbali, Shafi’i and Maliki schools of thought, have agreed that accidentally consuming breast milk will not affect the relationship between husband and wife.
Additionally; it is permissible in Islam for the husband and wife to touch their private parts in order to arouse each other.
There are commentaries on touching the male genital by oneself in various narrations of Hadith. One example is the hadith of Basrah bint Safwaan, who heard Prophet Muhammad (SAW) say: “Whoever touches his private parts, let him do wudoo (washing)’.” (Narrated by Abu Dawood, al-Tahaarah, 154. al-Albaani said in Saheeh Sunan Abi Dawood, no. 166, it is saheeh). Hanafi jurists claim touching the penis in Islamic Law is not a shameful act. The Sahih Hadith of al-Muwatta Imam Muhammad argues that “The act is not impure”. He emphasizes that “If the penis were vile or impure, it should be cut off from the body and thrown away”. The Hadith claims that there is no difference between the penis and the other parts of body.
However, there are also Sahih Hadith which mentions the performing of ablution is compulsory after the touching of the sexual organ. The first and second of these reports are related to the oft-cited report, given on the authority of Talq b. ؛Ali [b. al-Mundhir b. Qays], concerning the saying of Prophet Muhammad (SAW) about the penis. Talq b. ؛Ali said: “We were with the Messenger of Allah when a man, like a Bedouin, came to him and said: “Oh Messenger of Allah, what do you think about a man touching his penis after performing wudu?” Muhammad said: “What is it but a piece of your flesh?”. There is some disagreement about this report and as noted above, the strongest evidence for making ablution after touching one’s penis comes from Basrah bint Safwaan’s account of Rasulullah (SAW) saying “Whoever touches his genitals, let him do wudoo’.”
It is also reported that Prophet Muhammad (SAW) said:
“Whenever anyone of you makes water (urinates) he should not hold his penis or clean his private parts with his right hand.” (Sahih Bukhari, 1.4.156)
“When anyone amongst you enters the privy he should not touch his penis with his right hand.” (Sahih Muslim, 2.0512)
Schools of thought (Madh’hab) such as Shafi’i and Hanbali consider fellatio as permissible but only as part of foreplay while all schools regard genital secretion as impure. Oral sex is permitted provided that secretion from the genitalia is not consumed and no injury or infliction made. The consumption of semen on the other hand is believed to be not permissible by some scholars. However, the stronger view is that it is not allowed. The couple has to rinse their mouth afterwards to maintain cleanliness. According to a fatwa written by Shaykh Muhammad bin Saalih al-`Uthaymeen, the couple may then sleep in the bed in which semen was secreted since semen is seen as a pure substance under Islamic law; however, this is contingent upon the man’s cleanliness. If the husband has not washed himself after urination and before oral sex then the semen will become unclean.
Culled from Wikipedia