Oh my goodness, it’s so much better than petroleum jelly (and it won’t degrade latex/rubber). Put it anywhere, you can even eat it, it’s safe for nursing babies.
Other than nipples, it has thousands of uses. I use it under my nose where my CPAP machine rubs me raw. Oh, and it’s a great moustache wax too!
Just try it. I costs a bit more than PJ, but it’s like owning the best quality product of it’s type. Nobody can buy anything better.
I’m not sure a product which you can and will run out of really fits this community.