pleasure or contentment. Unlike the cliche, the malapropism suggests the heart to be something populated by cuckolds; the heart already cheats and is cheated by whatever it commits to; all the same there is pleasure or contentment in this.
warm the cuckolds of one’s heart
A malapropism of the cliche “warm the cockles of one’s heart” that simply means give one a comforting feeling of
Strumpets who throw bricks through our windows after we break it off with them warm the cuckolds of one’s heart. It shows that they cared enough to be crazy.