Cross-dressing is the act of wearing items of clothing and other accoutrements commonly associated with the opposite sex within a particular society. Cross-dressing has been used for purposes of disguise, comfort, and self-discovery in modern times and throughout history.
Almost every human society throughout history has had expected norms for each gender relating to style, color, or type of clothing they are expected to wear, and likewise most societies have had a set of guidelines, views or even laws defining what type of clothing is appropriate for each gender.
The term cross-dressing refers to an action or a behavior without attributing or implying any specific causes for that behavior. It is often assumed that the connotation is directly correlated with behaviors of transgender identity or sexual, fetishist, and homosexual behavior, but the term itself does not imply any motives and is not synonymous to one's gender identity.
Cross-dressing has been practiced throughout much of recorded history and in many societies. There are many examples in Greek, Norse, and Hindu mythology. A reasonable number of historical figures are known to have cross-dressed to varying degrees and for a variety of reasons. There is a rich history of cross-dressing found in folklore, literature, theater, and music. Examples include Kabuki and Korean shamanism.
It was once considered taboo in Western society for women to wear clothing traditionally associated with men, except when done in certain circumstances such as cases of necessity (as per St. Thomas Aquinas's guidelines in Summa Theologiae II), which states: "Nevertheless this may be done sometimes without sin on account of some necessity, either in order to hide oneself from enemies, or through lack of other clothes, or for some similar motive." Cross-dressing is cited as an abomination in the Bible in the book of Deuteronomy (22:5), which states: "A woman must not wear men’s clothing, nor a man wear women’s clothing, for the Lord your God detests anyone who does this", but as Aquinas noted above this principle was interpreted to be based on context. Other people in the Middle Ages occasionally disputed its applicability; for instance, the 15th-century French poet Martin le Franc, wrote: