The raphe is a little line on the underside of the penis and on the scrotum.
This line can run from the frenulum, along the underside of the penis and the middle of the scrotum all the way to the anus. With some guys it’s clearly visible, while with others it’s not.
Some don’t have a line but rather a light discolouring of the skin.
This line marks the junction of two parts that have fused together to form a straight structure. It originated in the womb. The genitals of both girls and boys are female in origin. Only after six weeks the male genitals start to develop. The inner lips fuse together and form the penis. The scrotum comes into being when the outer lips fuse, which later houses the testis that descend from the abdominal cavity. The “seam” sometimes remains visible.