Can one rub his private parts with his wife’s breast?

In the name of Allah, the most Beneficent, the most Merciful.

 Answer

Anal sex is prohibited in Islam.

It is narrated by Saaiduna Ibn Abbas Radiallahu Anhu that the Prophet of Allah Sallahu Alahi Wasalam has said:

“Allah does not look at a man who comes to a man or to a woman through its back.”

                                                                           (Sunan Tirmizi p.220 v.1)

In regards to the second question, in principle the husband and wife may take benefit of each other from any part of the body.

However, modesty is part of faith (See Sahih Bukhari p.8 V.1) and intimacy between the husband and wife should be conducted in a proper manner.

Only Allah Knows Best

Mohammed Tosir Miah

Darul Ifta Birmingham.