Spaniards are well-known for being loud and friendly. If you happen to visit Spain, don’t be surprised if a girl kisses you twice – once on one cheek and once on the other cheek- to introduce herself. It’s the Spanish way of saying “Hello!”

Source: http://www.sprachcaffe.com/english/magazine-article/amazing-cultural-facts-and-traditions-around-the-world-2015-08-05.htm