B.C.
if he is dirty he will come clean...but if it is just the way his skin is, my goodness don't scrub him raw. ALL my life I have dealt with my skin being "different" I am very pale complected and I have freckles, but my knees and elbows are significantly darker than the rest of me and I have no idea why. Pretty much if you wipe it with a wet wipe and it is still there no amount of scrubbing is going to change it, it has to do with pigmentation not dirt.