To me if it’s done purely for the attention of others rather than intrinsically motivated it’s childish. A general lack of responsibility is also childish. Tamer stuff like trinket collections, lewd jokes, cartoons and whatnot in my opinion is enjoyable independently of age. If anything judging those things as childish could be seen as childish. Who’s more obsessed with seeming all grown up than kids?
To me if it’s done purely for the attention of others rather than intrinsically motivated it’s childish. A general lack of responsibility is also childish. Tamer stuff like trinket collections, lewd jokes, cartoons and whatnot in my opinion is enjoyable independently of age. If anything judging those things as childish could be seen as childish. Who’s more obsessed with seeming all grown up than kids?