A thing I have noticed in Chile, or at least the places I have been so far is that any patch of grass is full of young couples. They are all hugging, kissing and rolling around together on the floor, it happens everywhere though, I was told it is because it is generally a very catholic country that doesn't allow or at least believe in sex before marriage, it is a very passionate country and is very conservative when it comes to things like sex and relationships. This makes it understandable why they choose to do this in parks, they have no other option really, they can't do it at home or in front of their parents.