What is the attraction of a crowded beach?

When I go to the beach in the summer I prefer to head to the quieter ones rather than those jam-packed with tourists. I don't get the attraction of sitting in a huge crowd of people or under a giant umbrella.
Yet every year millions head to the beach and do just that, why?
What is the attraction of a crowded beach?
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Contrary to popular belief, girls don't go to the beach to give head as the sand makes it gritty.
What is the attraction of a crowded beach?
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