Hi Nosha. We have two cats. One is entirely white and the other is a tabby. Different litters. The white came from my daughter's teacher (when she was 9, 17 years ago) and the other we bought at that time for my son who was 10. We have noticed for years that if we forget worming time has arrived, the white one (Snowy) starts sticking his tongue out. After worming he stops, until next time.....
Incidentally he is not at all well now. Luckily he wasn't born deaf as some white cats are, but he is now. And he is failing to clean himself properly. But he has been a great pet and we dread losing him. The other, Sheba, is as tough as old boots and is still fighting fit - but a lor more affectionate than she used to be.