Oral Sex With Wives
10-4-2004 | IslamWeb
Question:
What does the Shari'a say about oral sex?
Answer:
All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad 
is His slave and Messenger.
Both the husband and the wife can enjoy each other’s body.
Allah Says (what means):
• {They are clothing for you and you are clothing for them.} [Quran 2:187]
• {Your wives are a place of sowing of seed for you, so come to your place of cultivation however you wish.} [Quran 2:223]
However, one should put the following two conditions into consideration: First, he should avoid what is made unlawful by the Islamic law:
A. Making love with the wife in her anus which is a major sin and a sort of homosexuality.
B. Making love with your wife in her vagina but during her menstruation period, because Allah Says (what means): {And they ask you about menstruation. Say, “It is harm, so keep away from wives during menstruation. And do not approach them until they are pure. And when they have purified themselves, then come to them from where Allah has ordained for you.} [Quran 2:222] What is meant here is having sex with them. The same ruling is true for the confinement period till the blood stops and the woman performs Ghusl.
Second, one should make sure that the manner in which he makes sex is conform to the Islamic ethics, which are the best morals. As for what you mentioned; i.e., sucking, licking or oral sex, there is no clear evidence from the Quran or Hadeeth concerning them. The scholars of Islam differed on this matter. Some believe that it is forbidden, others believe that it is lawful. Allah Says (what means): {Your wives are a tilth for you, so go to your tilth when or how you will.} [Quran 2:223]
This means in any manner that suits you both but in the place of the tilth which is the vagina. It does not mean anywhere and anyhow.
There is a narration from the Prophet and his Companions 
that backs up this view. One should be cautious not to swallow some dirtiness, as the man might ejaculate in his wife’s mouth. Allah Says (what means): {Truly Allah loves those who turn unto Him in repentance and those who purify themselves.} [Quran 2:222] This means those who keep themselves above the dirty and the filthy things, which are the cause of forbidding the menstruation period and any part which is not the vagina. This kind of pleasure is far from the natural disposition upon which Allah has created us. Moreover, a tongue that supplicates Allah and reads the Quran should not also get in touch with those parts of the body which are a source of some impurity. Indeed, what Allah has made lawful for us is enough for any normal person.
Allah knows best.