We have a kitty that went thru horrible nightmarish episodes of "in heat". Yowling to wake the dead, you couldnt put your feet on the floor for two seconds. She wouldnt have anything to do with me most of the time (daddy's cat) but when she was in heat, she just wanted to wrap around my neck. I would be standing doing something, minding my own business and she would come flying out of nowhere to jump on my shoulders. She was "in" almost constantly. I got to where I almost hated her. Our other two cats were never like that. We finally got her fixed and she is the sweetest kitty ever. Completely changed her disposition. She was just miserable all the time before.