Well, you foster the cats; you're not their permanent human. Mine are quite affectionate -- Lucifer (the big red one) is usually lying with his back against me part of every evening, and Mephisto cuddles up to him. It's how we work, rank-wise -- Lucifer is my cat, and Mephisto is Lucifer's little brother. It means that he raised him from a nine-week-old kitten, trained and disciplined him, without me having to do much work, too.