Is it normal to have nipple funk?

Like bellybutton funk but in your nipples. Not a lot, but a little bit of "cheese" now and again. I've heard you can get it from playing with your nipples too much and I think that's why I have it. Also I kind of like the smell and taste of it (I pick it out, leading to a cycle of nipple funk). I know I am sick but I wondered if anyone else does this!