Many have been the wounded peddlers, who accustom [similar to 'pearls;] themselves to licentiousness. [Rashi Yevamot 63b: referring to men who travel to sell women’s jewelry. Their frequent dealings with women lead their husbands to harm them. Note: Talmud breaks the sentence.]
[Those who accustom themselves to licentiousness] are like a spark that ignites a coal. As a cage is full of birds, so are their houses full of deceit [Jeremiah 5:27].
A as a bird seized in a cage, so is the heart of haughtiness, and like a wolf ambushing his pray.