it lets you brush up against the humanity of a psycho , without making him any less psycho . 
(ROOT (S (NP (PRP it)) (VP (VBZ lets) (S (NP (PRP you)) (VP (VB brush) (PRT (RP up)) (PP (IN against) (NP (NP (DT the) (NN humanity)) (PP (IN of) (NP (DT a) (NN psycho))))) (, ,) (PP (IN without) (S (VP (VBG making) (S (NP (PRP him)) (ADJP (DT any) (JJR less) (NN psycho))))))))) (. .)))
(ROOT (S (NP (PRP )) (VP (VBZ ) (S (NP (PRP )) (VP (VB ) (PRT (RP )) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (NN ))))) (, ) (PP (IN ) (S (VP (VBG ) (S (NP (PRP )) (ADJP (DT ) (JJR ) (NN ))))))))) (. )))