We go naked because we want nothing of this world; for we came into the world naked and unclothed. As for not being ashamed to show our members, the fact is that we do no sin with them and therefore have no more shame in them than you have when you show your hand or face or the other parts of your body that do not lead you into carnal sin; whereas you use your members to commit sin and lechery, and so you cover them up and are ashamed of them.

The Travels of Marco Polo (1298)