I am aquiring this meme now. Thank you for your cooperation

Ooh, okay yea that's funny 😂 thank you ☺️

I was, but now it would seem it was a joke that passed over my head, and I still don't get the joke..

Genuine question: Doesn't peter say he's "not a boy" because he's not a child but an adult, and that's what Mr. Fish recognises? I haven't read the comics, so I'm just trying to gather information here ☺️