What is that strange non-pregnancy related discharge that comes out of your nipples?
First let me tell you that, before you get freaked out, this is in mnost cases something you should worry about at all. That funny spontanious liquid that you may find escaping from your nipples is in fact the result of a non-cancerous type of tumor. A large percentage of women grow these non hazardous little tumor-cells in the fatty tissue of their breasts. Although these tumors may become cancerous at a certain time, most of them don't. After a certain age therefor you should check regularly with your doc or at the hospital for cancerous mutations of those tumors. While your breasts are being squeezed and tightened all the time, for example when you wear a bra or during sex, these tumor cells often emit a fluid, which has to come out one way or the other, and in many cases it finds its way out through your nipples.
It may as well be that you suffer from an infection inside one or both breasts. In that case you will notice a more regular leakage of awkward fluid. When this happens quite often, say a few times a week it is advised to visit your doctor, she will be able to analyze what kind of fluid is leaking from your breasts.