Cantarella, I appreciate your response! However, NOWHERE does St. Thomas teach it is ok (good, moral, holy) for Chinese (or otherwise) women to wear pants etc....as you cited him as a source.
What he says is
Apparel should be consistent with the estate of the person according to custom. Afterall, we could say it is a Custom for Indians to be Naked...should we allow this in general, in society, or leave them alone to their Paganism and Witchcraft?
Granted, many women unhappily fall into this snare of the Evil One and lose their souls forever!
They would stop Birth Control, before they would OBEY their Husband and, in addition, wear modest clothing (hence not pants or trousers).
This does not mean look like a bland woman (or not), but that, modesty is the best policy and what a small price for Heaven.
A woman that wears a short mini skirt is more feminine than a woman that wears pants (unless some necessity, homelessness, or medical reason)....permits.
A. Women were NOT meant for manual Labor
B. Pretty Hard for a woman to give Birth with a pair of pants on - you get the point!
Article 2. Whether the adornment of women is devoid of mortal sin?
"Outward apparel should be consistent with the estate of the person, according to the general custom. Hence it is in itself sinful for a woman to wear man's clothes, or vice versa; especially since this may be a cause of sensuous pleasure; and it is expressly forbidden in the Law (Deuteronomy 22) because the Gentiles used to practice this change of attire for the purpose of idolatrous superstition. 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".
http://www.newadvent.org/summa/3169.htm