It is hard to tell what these spots are without seeing them. The actual number, the size and if they are elevated over the surface of the skin might have been helpful. A hint about the sexually transmitted diseases: in most cases, the signs appear within several days after the intercourse. So, if you can remember whether the spots appeared after intercourse or not, you might also make a pretty good guess if these spots indicate a sexually transmitted disease. But, even if the spots are not from sexually transmitted disease, a check with an urologist is still recommended.