Answered by Shaykh Amjad Rasheed
Translated by Wajihah Gregor
If the wife does not attain sexual satisfaction except from oral sex, does it become obligatory for the husband to perform it?
Walaikum assalam wa rahmatullah,
I pray this finds you in the best of health and spirits.
It is not obligatory on the husband to perform this. However, if he wants to, he can do it on the condition that he avoids contact with any filth.
Amjad Rasheed
See also:
The Fiqh of Oral Sex (Shafi`i)
http://qa.sunnipath.com/issue_view.asp?HD=3&ID=2189&CATE=357