My sister was diagnosed with antisocial p. disorder in the early 80's when she was 18.  No conscience.  Stealing, etc. but she has suffered the consequences.  Stds, rotten teeth, horrible credit, lost custody of her kids, etc.  I am older but she looks 10 yrs older than me.  Her body has suffered the ravages of binge-eating, anorexia, alcoholism, etc. 

After she turned 40, like the textbooks say, she seemed to settle down.  However, she has the maturity and people skills of a 20 yr old.  That is what was lost for living purely for her own pleasures. 

All her jokes, memories, etc are decades old.  I know what she is going to say before she says it.  Part of it is because we are sisters, but a big part is because she has lost 2 decades of her life.