If you’ve ever worked in retail you have probably developed a cynical attitude, a distaste for certain holidays and lost hope in humanity. Dealing with annoying customers, unreasonable requests and weird shifts for minimum wage is enough to drive anyone crazy. Here are 15 things all retail workers will know:

1. Customers having an attitude because you can't control things

2. People who enter the store with less than two minutes until closing

3. Parents who let their children run all over the store… and destroy basically anything they touch

4. Customers who say “There’s no price tag – it must be free!”

5. Being expected to stop thieves, but encouraged not to at the same time

6. You’ve mastered the “fake smile and laugh” every retail worker must wear

7. Customers who think telling you their life story or medical history is what you want to hear

8. Customers who place their money on the counter rather than in your outstretched hand

9. Customers who wander off in the middle of their transaction… with a line behind them

10. People who return things without a receipt and say “it's never been worn!” when it CLEARLY has

11. Never being able to make plans because retails requires the WEIRDEST hours

12. You are convinced “Black Friday” was originally called “Black Death”

13. Around Christmas, you despise Mariah Carey’s “All I Want For Christmas Is You”

14. You become extremely comfortable with rejection… thanks to your customers

15. You cannot shop happily in other stores because you now know the employee’s pain