God created our eyes to be able to appreciate His creation. The human anatomy is just one example of His work. It would be a disgrace to God and a great insult to His goodness if we are to ignore His works of art that reflects His Omnipresence. Note that God resides in every one of us. Hence, we should look at those bodies since God resides in each one of us.
I can't understand the psyche of people who would go to a beach and would walk the sand in an attire that should be worn in the city. You go to a beach to commune with nature. Then, be part of nature and be there in an attire that approximates your birthday clothes.