When my son first said "frog," it came out consistently as the f word. He was probably wondering why we asked him to say frog over and over again!

He's 5 1/2 now but hasn't sworn yet... he's heard some curse words here and there though, as I listen to crime and story podcasts and sometimes they slip in there. It seems due to happen any time now though, and wondering when it usually starts in most households.