So I have a weird question about one of my boys, Donnie. He's a neutered 9 month old cat with a very unique personality, which is great. He's not always very fond of ear scratches but will start purring like a jet engine when the area on his back in front of his tail is scratched, he flips over, purrs and pulls himself along the floor in what must be some sort if kitty ecstasy. I don't always rub his tummy because he doesn't always like it, but I've found if I rub right near his penis he'll arch his back and flex his paws. I was doing it for awhile yesterday while watching tv, and all of a sudden he started to make a very strange sound. It almost sounded like a sound he makes when Bobbie is being particularly vicious in one os his attacks. BUT, his eyes were closed, his back legs were almost touching his head, and he was purring. I can't figure it out, is it a good sound, bad sound, should I not do that? I don't know, I've had cats all my life but I have never seen or heard of a cat doing this when scratched like that!!!!!