First of all, I thought I should not laugh at my dad's corny jokes. Like when talking about someone who is hearing impaired and my dad would pretend he didn't hear by saying, "What? Huh?" Of course I fell for it every time and repeated the thought again.... and again. Is that really funny? Yes. Actually it still is.
A grown-up, sophisticated person should also NOT laugh at anything having to do with farting. In my mind, being mature and cool meant farting would cease.... or at least cease being funny. Oh, how far I've fallen. Just the other day I busted up laughing when Mandy tooted in the bath and then giggled as she said, "My fart tickled me!"
And Camo. It should not be funny when someone is wearing camouflaged clothes to say, "Wow, I can't see him." Or "We'll never find him now," as the person runs around in camo clothes. When I grow up, I am seriously not going to laugh at that.