Valentine´s Day

1. When is it celebrated and what do people do on this day?
2. According to legends, who was Valentine? What did he do? Why? What happened? 
3. Why did they choose the 14th of February ?
4. When and why did they start to exchange handwritten notes?
5. In USA, what do they also start doing?
6. Why is it being critized in recent years? 
7. Is Valentine's Day celebrated all over the world? 
8. What is this video about?

Give your opinion about Valentine's Day.