J.W.
Well for one I don't think it will scar. Even if it did who would be looking down there?
I wouldn't make a fuss about it, the fuss will probably have a more lasting effect than the injury itself.
So far as injuries go I was a gymnast for five years when I was young. You injure yourself a lot between the legs whether it be hitting the unevens wrong or for me missing on the beam. :( No lasting effects.