Thanks Yvonne, it's definitely not poop. I've bathed her/him ?? very regularly since I saw it and I think you are probably right about prolapse, off to the vet in the morning, thanks again, celineDoes that black spot go back inside or does it stay out all the time? It may be a prolapsed penis. Don't allow it to dry out, and take the tortoise to the vet.
It might also just be some poop. Don't be afraid to give the tortoise a close inspection.