Maybe it's just me, but I don't see the any positives in the old fashioned way of "being a lady or a gentleman" towards the opposite gender. For one, the very relationship of the two terms was one that was sexist, which assumed the male was the "lord of the castle" and had the better judgment in all scenario's of life, while the female was an innocent little flower that must remain chaste until her father picks out a "suitable" man for her to enter marriage with, bear him children, fix his meals and keep his "castle" clean while he was off being a "man" in society. This was also pretty much the fundamentals of the concept of Chivalry, where courtship of the female by the male almost always came down to treating the woman as though she were a completely naive child that needed help understanding most aspects of her life, including how the men expected her to dress, how to present herself in society before their friends and colleagues without embarrassing the husband, how many children were appropriate for their marriage/how they would be raised, as well as dictating her religious, social and economic beliefs in which to quickly silence what could be a relationship in which she dared to question the beliefs of her husband, either in public or before the children. (Although, one would not argue that even slightly romanticized aspects of Chivalry like remaining courteous and thoughtful when engaging in social interaction with a woman, and doing those little things picked up over time as you get to know the woman that make her feel like you really care and respect her opinions, tastes and feelings in the relationship are not rather beneficial to keep in mind when courting a woman you like in modern times, either)
In short, our concepts of a "lady" and a "gentlemen" are purely romantic notions of love and gender tradition that we have been colored with through things such as Shakespeare and the Victorian Age, medieval tales such as Camelot and King Arthur, and.. pretty much every romantic novel written since the early 1930's. Being a real gentlemen in this modern age is simply treating women with equal respect in how they choose to live their lives, and how they choose to express themselves when interacting with society - acknowledging they are independent individuals whom can handle that without coddling them. Being a real lady in this modern age is simply the flipside for female-to-male interaction. It has nothing to do with dressing a certain way, or thinking a certain way at all.
The definition of a "slut" is not universal to each and every person whom hears and uses the word, and in which case calling someone a "slut" for doing something or wearing something you don't personally like or appreciate does not make them a slut. It makes them an individual with tastes and preferences different from you, and you really have no right to try to force them to conform to your tastes. Of course, if a woman or a man is wearing particularly suggestive clothing while in public, they really cannot get upset if people happen to look in that direction due to the suggestive nature of the clothing or body language (whether intended or not). Though no less, that ends up with the rule of basic common decency known as "look, but don't touch (unless given permission)".
