Is it necessary to express valentine greetings in the public?

Tweet

You can express any thing. But is it necessary to express in public places. To day I observed many lovers expressing their love with kisses in the public places. Is it necessary. Some people kissing deep for 5 mins or so. This is sometime irritating to see with children. I feel expression is internal. Express your love its great feeling. Why it should be in public places? Why this showy business? I also noticed many girls wearing transparent, and sexy dresses specially for this valentine day. why to expose in public? What culture is this!! What do you feel.