unsolicited kiss

Can somebody please tell me why this was necessary?I was rounding the corner to enter through the ADPP gate about five minutes ago for my evening class. One of the usually shy guards pops out and pulls me in for a Brazilian, right cheeked kiss. Oh, I thought, we're going for a Brazilian, he.. he.. nervous laughter. Then he whips around for an Italian kiss on the left. This time I step back. Then he pulls me into him and plants his hot crusty lips on mine. I jumped back. He said something in Portuguese. I was disturbed and had no words to communicate my disgust in Portuguese and hurriedly slid through the gate. Why? Why was that necessary?? I still have to walk home in the dark past the same guard station!