M.N.
Wow, R., it seems like you did an excellent job in a very uncomfortable situation. To give you closure (because I think that he will be fine) I would suggest bringing up to him the fact that you were so proud that he came to you right away. This way you are not bringing up the yucky part but you are telling him in so many words that you want him to continue to come to you in the future if ever there is something that bothers him. It sounds like you did a great job raising him for him to be so comfortable coming to you both first, and by the way...it was a good sign that what he saw bothered him.