I had
milk in one
breast from the time I was about 17 until... well.. now. After I had my son, that breast continued to leak small amounts of milk for 4 years until I got pregnant again, and now it leaks collostrum!
The doctors checked me out and all hormones seem to be okay, and it's not an infection, so they just shrugged and said it was no biggie, so it's not really bothered me much. The leaking isn't significant, and we find it a source of humor sometimes.