You could argue that the hyper sexualization of our culture trains both sexes to act in ways that are indecent. For example, men are taught to always make the first move and to be strong and persistent. How many romance movies involve a women rebuffing a man only for the man to keep trying until he "wins her over"? When someone misreads signals - as we all do, this conditioning can cause someones behavior to become creepy, inappropriate, or worse.

Thus because we are conditioned to sometimes be indecent, it does in some circumstances require effort to override it.