wears you down like a dinner guest showing off his doctorate 
(ROOT (S (VP (VBZ wears) (NP (PRP you)) (PRT (RP down)) (PP (IN like) (NP (NP (DT a) (NN dinner) (NN guest)) (VP (VBG showing) (PRT (RP off)) (NP (PRP$ his) (NN doctorate))))))))
(ROOT (S (VP (VBZ ) (NP (PRP )) (PRT (RP )) (PP (IN ) (NP (NP (DT ) (NN ) (NN )) (VP (VBG ) (PRT (RP )) (NP (PRP$ ) (NN ))))))))