Why do trees seem suspicious on sunny days? Dad Jokes Why do trees seem suspicious on sunny days? Dunno, they're just a bit shady.. 👍 Upvotes: 0 More Dad Jokes You see, mountains aren’t just funny. Why can’t bicycles stand up on their own? When does a dad joke become a dad joke? Why couldn’t the lifeguard save the hippie? Why did the cookie cry? How does the moon cut his hair? See all Dad Jokes →