4.) They have formulated the perfect escape plan for you.
If you or your wingman realize that the person you have been pursuing for the night may not be the best person to hook up with, then they help you get away from them.
3.) They get really, really drunk with you.
Your wingman understands the reality of “liquid courage,” and they want to help you on your journey to encouragement. So, naturally, they make the process a lot more fun and a lot less depressing by drinking a lot with you before you make your approach.