Some Religions emphasize on wearing full clothes but God send us naked. If clothes are necessary then Why doesn't God send clothes to us through the womb of mother?
being "naked" is not a sin... but... what some do while naked is..... in order to keep order in human society it has been found that it is best, generally speaking, if some "temptations" be kept private.... but there is no prohibition against nudity in God's instructions to His Church.... despite that some translators have altered the text to make it seem that nudity is forbidden
You'll find out when you take biology 101.
Clothes are only needed for protection against the elements in all honesty. Also, in today's society, it is demanded that clothing be worn, but different cultures have different ideas regarding dress or lack thereof.
Clothing is not necessary! You could survive perfectly well if you simply stayed indoors all day.