page 11 is suppose like J was joking but if we see what J got when he young its look sad and actually he really like it because he can experience what actually normal children do at their age that J cant get before
It's amazing just how accepting J has become of everything after all the events of this story. Buddy didn't bat an eye at cosplaying for a female lolicon
I think what the context around page 23 J was legit surprised he found a real human being because mom declared that people are only human after entering Toudai.
Also I guess now J is more satisfied being a goblin than a human after seeing a real one