I Avoid the Normal People

I avoid the normal people 
 Their contentment baffles me
 But I sometimes like to watch them 
 (I hope that they can't see)
  
 They calmly keep on going 
 They look like they belong 
 I think that they are happy
 (But I might be wrong )
  
 Sometimes one will talk to me 
 And they're usually polite 
 Thankfully they don't stay long
 (They can tell I'm not quite right )
  
 And though this "mental illness"
 Is so often berated
 I suspect that Normality
 Is very over-rated