Some quotes from Raptor Red by Robert T. Bakker.
http://en.wikipedia.org/wiki/Raptor_Red
Raptor Red knows what she likes in a male dancer – slender, muscular limbs, and supple S-curves in neck movement – but she doesn’t know why. She was born with a vague idea of male beauty, an idea that was refined by watching her mother and father. She doesn’t know that these strict standards will help guarantee a mate who will be faster than she and more maneuverable – key assets when lovers hunt together as a team. – Raptor Red (127)
Raptor Red isn’t the ideal mate, if her situation were evaluated by some dispassionate computer. The sister is an obvious liability. Still, the young male is captivated by her. Something about Raptor Red makes him want to hang around, to try to make the pair-bond firm. Raptor Red has been gentle in all her responses to his advances, and he finds that attractive. – Raptor Red (141)
Joy is built in by evolution to keep animals doing what’s good for their genes. – Raptor Red (168)
