My cat and apples

Not sure if this is the right section to post this in, but my cat loves to lick the apples I buy at the store. She licks the the stuff that they put on apples to make them more shiny and so that the apples keep better(I think it's wax or something based on it. When I asked at the store they didn't know).

So does anyone know what it is that fascinates my cat and if it's safe to allow her to lick it?

Thanks for the information!

Apples aren't harmful to cats but the seeds might so don't let your cat eat the seeds. The wax coating growers put on the applies is to keep the apples fresh during transit to stores. I'm not sure if it's harmful to cats or not but I'd err on the side of caution and not let a cat lick it. Cats will lick a lot of things because it smells good to them but it may or may not be safe for them to do so. Can you keep the apples in a cabinet or the fridge where they will be out of reach from the cat? Or buy apples that don't have the wax coating, probably something you'll only find at an organic supermarket or framer's market or a pick-your-own-apple type farm.

To clarify, my cat isn't interested in the apples. She does lick some of the moisture of the cut peaces, but the primary interest is in the wax coating. 

That said the apples are usually out of reach for her so no worries in that regard. She can only get them when I eat them.

Thanks for the input LTS3.

If anyone know more I'd be grateful for the info.