Spain is home to millions of foreigners, so a multicultural environment doesn’t surprise anyone. However, newcomers should understand that their native customs may surprise locals, since the Spanish culture is quite particular in many senses.
Here is an article about the most standard situations that provoke awkward experiences with Spanish people .
Know how to greet a Spanish person
When Spanish people meet, they greet each other with kisses on the cheek. No matter if you are foreigner and they see you for the very first time, they will give you those two kisses. So, it is better if you could control your instinct to give a handshake, anyway it will not help you to avoid the double kiss.