Hi I have 4 dark circles on my foreskin below the head when the skin is at rest but it looks like a ring when the skin is at rest. When you stretch it, you can see they are circular. There is no pain, no itching, nothing abnormal, just the color. When it s a erect the color lightens a bit but you can clearly see them. No issues urinating or having intercourse, and no issues staying erected and can complete ejaculation. I am just curious why I have these spots. They have been there since I hit puberty a little over a decade ago.