If you think that you should be permitted to Kiss and hug on the roads, parks and hotels as modern trend, I am sorry to say you are in stone age. It is more of adam and evil story. They never had closed places to do that those days.
Chennai is a place which respects traditional indian culture when compared to any other city in india which is developed to that level. There are parks in chennai where for years and years lovers come and join hands [valluvar Kottam, Panagal park, Besant nagar beach etc]. Slowly it started becoming places for immatured youngsters and part time pros. No place in India where the population of the city's originated crowd is more, they want to loose their culture. If you look at places like Delhi and Bangalore, it is the crowd which moved from other places are more. So there is no culture in these places.
Nobody restricts to kiss or for that matter do anything in your own place. No culture in India permits you to do this in Public. But the generation has changed a lot following westernisation only for the wrong doings and not for any other disciplinary things which western countries do. It is shame on them.