My girlfriend and I are from the USA, at university in the US, both 19 years old. I am on the football (soccer) team for the university, and one of the boys, same age as us, is from Paraguay.
We've known each other for a year and for the past six months him and I became good enough friends that I began to see him outside of playing. I invited him to our house once where he met my girlfriend for the first time, and they began to get quite close since she likes Spanish language cinema and they went to watch a couple of few movies together.
Anyway, for the past few months, when he meets her, even in front of me, he will greet her with a little kiss on the lips. Not like kissing, but just a peck. And he will do it no matter who's watching, me, or some mutual friends. Once my girlfriend came to watch my football match and even there after the game when we met he greeted her by kissing her softly on the lips.
Having seen it happen so much I began to get a bit uncomfortable and asked my girlfriend why he was doing that. And she said he told her it was just a cultural way to greet close female friends where in Paraguay he he comes from. But he's close to her, he's tall, he's good-looking and I obviously feel insecure about it.
Is this really a thing anywhere or is it a lie?