Praise be to Allah, the Lord of the Worlds; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions. If a person necessarily needs this massage like one whose penis is too small that it cannot fulfill the need of his wife, there is nothing wrong in it. But if there is no need for it, doing so can lead him to forbidden things like revealing one's ‘Awrah (parts of the body that must be covered in Islam) without any lawful reason. In Al-Insaaf (authored by Al-Mardaawee), the following is said about the ruling pertaining to exposing one's ‘Awrah: 'if a man in a secluded place, where nobody sees him, if there is a needs to expose his ‘Awrah like when he wants to ease himself, he can do that. But if he has no need to do so, the correct opinion according to the ( Hambali ) Madhhab is that, exposing one's ‘Awrah without any necessity is forbidden' . In one of the books of Shafi'e Madhhab, "Asnal-Mataalib" (By Zakariya Al-Ansari ), the author said, 'the ‘Awrah must always be covered both in the prayer and outside the prayer even if one is in a place where no one can see him' . The evidence is the saying of the Prophet (Sallallahu Alaihi wa Sallam), "And do not go naked" [Reported by Muslim ]. He was also reported to have told Jarhad , "Cover your thigh, for thigh is part of ‘Awrah " [Reported Ahmad , Abu Dawood and Al-Tirmizi . A-Tirmizi confirmed it as a sound Hadith]. Another proof for this is that Allah is more worthy of our respect, our modesty. Allah knows best.