more chinning?

maybe its nothing, but recently I find that my rabbit is chinning me a little more. If I put my hand somewhere close to here, like when i'm about to pet her or feed her, she chins my fingers, is this something I should think about or just some new cute thing from her?

for example this morning I was getting ready for work and not giving her any attention, she desperately chewing on her cage wanting to get out, I open it and pet her a little and give her a treat, but first she has to chin each finger on my hand

They have a scent gland on the bottom of their chin, she's rubbing you to say you're hers It's a cute/ territorial thing. My bun hasn't done this yet, he doesn't seem bothered, he's more bothered about nose bumping objects.