Here we can see a heart-shaped outline. This symbol appears on a lot of things, like chocolates, greeting cards, confectionery, etc. The sky is the limit... is almost a cliché... but what a lovely and traditional cliché of our days.
The doves are just white pidgeons, but the meaning about them, is when they are looking for a mate is seen as a symbol of love and creation.
This is a representation of Eros (Greek) or Cupid (Rome), god of love. Whit his divine arrows, shots persons with the purpose that people fall in love.
The greetings cards or valentines, are important in this actual tradition. You can give one to the person do you like the most or your mom, it doesn't matter, the point is say what you feel, not only on Valentine, everyday, that is just a reminder.
Do you remember the song we listened to?, good because it was related to that day. In some cases, Valentine is a day of gladness, but for others is just bad and sad to be alone that day... they forgot the fact they have friends too