why do people pretend to get drunk when you pretend to give the alcohol?

Question: why do people pretend to get drunk when you pretend to give the alcohol?
- Keywords:
  alcohol,
  drunk,
  pretend
Asked by ninja squirtle to Andy on 8 Mar 2017.
- Andrew Jones answered on 8 Mar 2017:
  
  It is the anticipation of being drunk amplifies some of the effects that people believe happen, like slurred speech and sociability

Question: why do people pretend to get drunk when you pretend to give the alcohol?