Mine has one. She has a little swirl of fur in the center of her abdomen. It's the cutest thing.
Poke my stomach one more time and I'll shred you!
My kitty, Jane, has the cutest belly button on the planet. When she had abdominal surgery, I specifically requested that her belly button be saved.
My little kitty woman has all her external pink bits. She taught me how to love again too.
I have all my external pink bits as well.
My male cat has tiny hard nipples. I just notice them when I pick him up.
The only tuft of white fur on my smoky gray tom is covering his umbilicus.
He demands that I pet his belly when he lies on his back with his paws in the air.
He gets "in the zone" when I do this for him.
When you're looking for it, just make sure not to poke your pussy in the pussy.