"It's simple biology, not anything about virility," he replies. "Omegas don't react well to stress and duress. It sets their cycle completely off kilter. That's why you rarely see children from an unhappy mating." He doesn't actually look to Crowley, but he is the one with the greatest number of former mates. The rest of them are looking for their first.

The look in Castiel's face, though, makes him wish he hadn't spoken about meals at all. "That's okay. I'm sure that my brother would love to have somebody to teach. He likes to cook to unwind from the business."