" It’s normal.” Doc grinned. “The mating ritual of all animals. The males fight for dominance over their females. Human males have lost the fight in the past generations with feminism and equal rights and getting in touch with their sensitive sides,” he snickered. “Callan’s DNA refuses to allow him the choice in dominating her. It’s part of his genetic code. "

― Lora Leigh , Tempting the Beast (Breeds, #1)