When asked by Tumek, Worf says that he has never pursued a Klingon woman. However, he was once involved with K'Ehleyr, the mother of his son, Alexander. Before his family was dishonored, Worf attempted to marry her. As half-human, half-Klingon, K'Ehleyr was not fond of Klingon tradition, so Worf likely did not court her per Klingon custom. Though, they did engage in the Klingon mating ritual.