Not on public places. Think of the children! No, but it's inappropriate. And every guy passing by will be faced by his girlfriend's wrath. But the reason that it's that way is that we've for years been going through the zone of what is appropriate, stretching several hundreds of years back when it was inappropriate for women to show her ankles. Step by step, we've been narrowing it down, deciding what is appropriate to wear depending on the rate of arousal. And there are specific parts of a woman that arouses a man, so we've narrowed it down so that the areas of the body that are most arousing/"inappropriate" are covered up.