For a while, Goku used to wear his hair in a ponytail. Did he do it himself?
Minekura: Oh, we’re touching a sore spot! (laughter) There’s no way Goku would have done it on his own, back then, so it had to be Sanzo… And why did it have to be tied? I can’t picture the scene in full detail, but if I think about it Goku’s hair got stuck somewhere in an altar and made a total mess, so Sanzo would have said “I’ll cut your hair” and since Goku was so against that he had no other option but to give in. So every morning Goku would come by with a string and say “Sanzooo, tie it up for me!” until it became a daily routine. Sanzo would find it bothersome, but do it anyway. It’s charming to think about.