As a matter of fact God did not say one has to wear clothes. It was not until Adam and Eve ate whatever it was they ate that they realized they were naked. They were the ones, without prompting from God, to make fig leaf coverings. God only made a more permanent version.
By my logic then, we wear clothes (apart from climate comfort) only because pagans and sinners are ill at ease without clothes. Somehow, over the years, these pagans and sinners have convinced a goodly number of christians that we should be the ones to insist everyone must wear clothes. And clothes that have at least a minimum amout of coverage too boot.