Dark Psychology you should know:

1. When someone thanks you. Don't just say. "You're welcome"

Say " l know you'd do the same for me" and they'll feel closer to you.

2. When someone is upset, mirror their body language to shoe empathy

3. If you give someone a compliment, make it specific to make it more meaningful

4. If you want to appear more confident, keep your chin up and shoulders back but if you look down you'll seem insecure

5. To stop someone who's lying, stay: could you repeat that ?