Is this normal??? Never really looked before TMI PIC

So I was examining my nipples today cause they seemed a bit irritated.

It's like in the very middle of my nipple is a little opening and these tiny little flaps that seem almost moisturized or something.

Is this normal??? I have like never inspected them before so I have no idea if this is new or not. I'm not pregnant and have never been pregnant. I guess I don't know the anatomy of the nipple lmao

TMI PICTURE