Nakedness is a SIN
Hab.2  Woe unto him that giveth his neighbour drink, that puttest thy bottle to him, and makest him drunken also, that thou mayest look on their nakedness!
Gen.2: Now the serpent was more subtil than any beast of the field which the LORD God
had made. And he said unto the woman, Yea, hath God said, Ye shall not eat of every tree of the garden?
 And the woman said unto the serpent, We may eat of the fruit of the trees of the garden:
 But of the fruit of the tree which is in the midst of the garden, God hath said, Ye shall not eat of it, neither shall ye touch it, lest ye die.
 And the serpent said unto the woman, Ye shall not surely die:
 For God doth know that in the day ye eat thereof, then your eyes shall be opened, and ye shall be as gods, knowing good and evil.
 And when the woman saw that the tree was good for food, and that it was pleasant to the eyes, and a tree to be desired to make one wise, she took of the fruit thereof, and did eat, and gave also unto her husband with her; and he did eat. And the eyes of them both were opened, and they knew that they were naked; and they sewed fig leaves together, and made themselves aprons.
 And he said, I heard thy voice in the garden, and I was afraid, because I was naked; and I hid myself.  And he said, Who told thee that thou wast naked? Hast thou eaten of the tree, whereof I commanded thee that thou shouldest not eat?
Gen.9  And Ham, the father of Canaan, saw the nakedness of his father, and told his two brethren without.  And Shem and Japheth took a garment, and laid it upon both their shoulders, and went backward, and covered the nakedness of their father; and their faces were backward, and they saw not their father's nakedness.
Exod.32 And when Moses saw that the people were naked; (for Aaron had made them naked unto their shame among their enemies:)
Lev.18  None of you shall approach to any that is near of kin to him, to uncover their nakedness: I am the LORD.  The nakedness of thy father, or the nakedness of thy mother, shalt thou not uncover: she is thy mother; thou shalt not uncover her nakedness.  The nakedness of thy father's wife shalt thou not uncover: it is thy father's nakedness.  The nakedness of thy sister, the daughter of thy father, or daughter of thy mother, whether she be born at home, or born abroad, even their nakedness thou shalt not uncover.  The nakedness of thy son's daughter, or of thy daughter's daughter, even their nakedness thou shalt not uncover: for theirs is thine own nakedness.  The nakedness of thy father's wife's daughter, begotten of thy father, she is thy sister, thou shalt not uncover her nakedness.  Thou shalt not uncover the nakedness of thy father's sister: she is thy father's near kinswoman.  Thou shalt not uncover the nakedness of thy mother's sister: for she is thy mother's near kinswoman.  Thou shalt not uncover the nakedness of thy father's brother, thou shalt not approach to his wife: she is thine aunt.  Thou shalt not uncover the nakedness of thy daughter in law: she is thy son's wife; thou shalt not uncover her nakedness.  Thou shalt not uncover the nakedness of thy brother's wife: it is thy brother's nakedness.  Thou shalt not uncover the nakedness of a woman and her daughter, neither shalt thou take her son's daughter, or her daughter's daughter, to uncover her nakedness; for they are her near kinswomen: it is wickedness.  Neither shalt thou take a wife to her sister, to vex her, to uncover her nakedness, beside the other in her life time.  Also thou shalt not approach unto a woman to uncover her nakedness, as long as she is put apart for her uncleanness.
Lev.20  And the man that lieth with his father's wife hath uncovered his father's nakedness: both of them shall surely be put to death; their blood shall be upon them.
 And if a man shall take his sister, his father's daughter, or his mother's daughter, and see her nakedness, and she see his nakedness; it is a wicked thing; and they shall be cut off in the sight of their people: he hath uncovered his sister's nakedness; he shall bear his iniquity.  And if a man shall lie with a woman having her sickness, and shall uncover her nakedness; he hath discovered her fountain, and she hath uncovered the fountain of her blood: and both of them shall be cut off from among their people.  And thou shalt not uncover the nakedness of thy mother's sister, nor of thy father's sister: for he uncovereth his near kin: they shall bear their iniquity.  And if a man shall lie with his uncle's wife, he hath uncovered his uncle's nakedness: they shall bear their sin; they shall die childless.  And if a man shall take his brother's wife, it is an unclean thing: he hath uncovered his brother's nakedness; they shall be childless.