Is it normal to jack off your male cat? :s

I know this has to be sick and abnormal... but I'll ask anyway just incase someone has had the same experiences.... I only did it once because it just doesn't feel right, but I have a male cat and I touched his penis.He seemed to like it and it kind of turned me on, which was what made me feel the most uncomfortable :S but I had a feeling that it was really bad and sick and wrong... but he seemed fine with it :P I don't plan on doing it anymore because it made me feel horribly guilty :P Is this at all a normal, or am I a sick human being for doing this once?