there may well be some deep-seated psychological issues, perhaps something to do with repressed memories from the years in which he and his mother had been abandoned by his daddy.
He shouldn't worry - it is no source of shame. Since time began, some unfortunate women have had to make a living in the only way they can, by selling that commodity for which there is always a demand, no matter how tattered and scabby it may have become through years of overuse.