Can he wipe over his khufoof when removing madhiy (prostatic fluid)?
Question

                When purifying myself from madhiy, can I wipe over my socks?.
Praise be to Allah.
    Firstly: 

    Madhiy is najis (impure) and nullifies wudoo’ according to 
    scholarly consensus. 

    An-Nawawi (may Allah have mercy on him) said: The ummah is 
    unanimously agreed that madhiy (a fluid which is usually secreted as a 
    result of sexual excitement) and wadiy (a thick white fluid that may come 
    after urination or due to other reasons such as illness) are najis.

    End quote from Sharh al-Muhadhdhab, 2/571 

    And he (may Allah have mercy on him) said: Ibn al-Mundhir 
    said: They are unanimously agreed that it (wudoo’) is invalidated by the 
    emission of stools from the back passage, of urine and madhiy from the front 
    passage, and of wind from the back passage.

    End quote from Sharh al-Muhadhdhab, 2/6 

    Secondly: 

    What is required when purifying oneself from madhiy is two 
    things: 

    1.To wash the penis and testicles 
    to remove whatever has gotten onto them of madhiy, because of what has been 
    stated above of it being najis.

    2.To do wudoo’ to purify oneself 
    from it when wanting to pray or to do anything for which wudoo’ is 
    prescribed, because madhiy is one of the things that invalidate wudoo’, as 
    stated above.

    See also the answer to question no.
    2458 

    With regard to washing off the traces of madhiy, this 
    requires washing the traces from the affected part of the body; it cannot be 
    imagined that this involves wiping over the khufoof, as is quite obvious. 

    As for doing wudoo’ because of madhiy, it is like doing 
    wudoo’ in the case of any of the other things that invalidate wudoo’. If the 
    individual put on his khufoof when in a state of purity, it is permissible 
    for him to wipe over them when doing wudoo’, because of the hadeeth of 
    Safwaan ibn ‘Assaal (may Allah be pleased with him) who said: The Messenger 
    of Allah (blessings and peace of Allah be upon him) used to command us not 
    to take off our leather slippers for three days except in the case of 
    janaabah, but not in the case of stools, urine or sleep.

    Narrated by at-Tirmidhi, 96; Ibn Maajah, 478; and others. 
    Classed as saheeh by al-Albaani in Mishkaat al-Masaabeeh, no. 520 

    This indicates that wiping over the khufoof is permissible in 
    the case of things that invalidate wudoo’. But in the case of janaabah 
    (impurity following sexual activity), that requires ghusl so it is not 
    permissible to wipe over the khufoof when purifying oneself from it.