My early days were spent at Tuticorin and the only beach I knew was the Tiruchendur beach, adjoining the temple. The standard practice was to go to the sea and sprinkle a few drops of the 'holy' sea water and then go to the temple.
So when I first went to Marina beach at the age of 9, I did the same thing. My uncle asked why and I told him about Tiruchendur. He replied with a poker face "Thank God, you didn't do a namaskaram at the Anna Samadhi" and the entire famliy burst out laughing.
This would have been a long forgotten childhood memory but I am reminded of this often as I married my uncle's daughter :-).