Sentence:  Professionally a lawyer , that is to say associated with dignity , reserve , discipline , with much that is essentially middle-class , he is compelled by an impossible love to exhibit himself dressed up , disguised - that is , paradoxically , revealed - as a <WSD>child</WSD> , and , worse , as a whore masquerading as a child . 
Meaning of the word marked with <WSD> tags:  a young person of either sex