Nudism a way of life vs SEX

If seen according to nature,,,,,, Sex is just a wonderful process to produce children,,,, pleasure sometimes..but is it a way of life ? NO Whatever people have understood about sex today, it is man's own discovery. Only humans do not come in nature, All other creatures, animal, bird etc. are all part of nature. Except human beings, no animal wears clothes, Not as serious as humans about sex,,,, When man himself was a primitive man, he used to be naked, and was not so serious about sex,,,,