How do you know when you've had too many Dr. Pepper shots?
What about when
- your boyfriend holds on to your arm when the train approaches the platform,
- you don't care who saw you fall asleep, standing up, knocking your head against the pole,
- and when a nice woman picks up her bags and offers you her seat on the train... and you don't take it!
Yea, those seem like pretty good hints.