Sentence 1: Harris has never celebrated St Patrick's day. 
 Sentence 3: So Harris goes to the bar downtown with them 
 Sentence 4:  He drank way too much green beer at the bar 
 Sentence 5:  Harris threw up, and will never celebrate St Patrick's day again 
 Option 1: His friends always have, and he doesn't want to be left out. 
 Option 2: His friends always have, but he had no interest in celebrating with them.