I have never knowingly seen a cat on heat, plus I got ny female torties at 4 months from CPL, and both had been spayed.
Over the last few weeks, one of them (now 18 months old) has started falling down on the floor in front of me, and rolling around excessively, curling herself around the table leg (from a lying position), and just basically being very odd!
She is a Mummy's girl, for sure, so I wouldn't put her past just wanting a tummy rub, plus she is also enjoying the warmer weather and just getting the chance to go out and climb trees.
But what is up with her? She is rolling as though I've given her cat nip, and then all stretched out like a little hairy Superman. No weird noises though. Any ideas?