My big boy, Mr. Tibbs, loves to have his chin scratched.
He has so much weight to him that grooming is not so simple. He has a difficult time getting his leg up to have a wash. Never mind, the position of the limb going straight up and over the head that some cats manage.
Whenever I rub the jaw line, his back leg begins to twitch like a jackhammer. I have only seen dogs do this. His leg never quite reaches me or his chin but the purring says it all, ‘Satisfaction received.’