His seventh advice:

Never go anywhere with someone you don't know.

Once I was waiting for my mother in front of the supermarket. A guy came to me and said, 'Come with me, I want to buy ice-cream for you'. I didn't know the guy. I like ice-cream. I wanted to go. He took my hand and we walked away. Then I heard my mom. She was calling me. I turned back. My mom was very angry.

• Do you know everybody in your street?
• Do you know everybody in the market?
• Do you speak with people who you don't know?