Such reminders may make the unchaste feel ashamed just as reminders about courage may make the cowardly feel ashamed or reminders about temperance may make the intemperate feel ashamed.
In the first half both performances are so convincingly young, vibrant and unchaste that one begins to be consumed by the lovers whilst simultaneously chiding them for their foolishness.
She told him that she was his accuser in heaven, on account of an unchaste thought the (married) narrator had once had concerning her, though only in passing.