Why do humans procrastinate even when knowing the consequences?

Humans procrastinate even when they know the consequences because their brain likes fun now more than work later.

Imagine you have a big pile of blocks to stack, and if you finish, you get ice cream. But instead of stacking right away, you keep playing with your toy car, driving it around the room. You know that ice cream is good, but the toy car is fun right now, so your brain says, "Let’s do that first!"

Your brain has two parts: one that thinks about the future (like planning a party), and another that wants to play right away. The part that wants to play is like a little kid who shouts, "I want candy now!" even if you know you’ll get more later.

Sometimes, the work feels too big or hard, it’s like trying to climb a mountain when you’re still wearing pajamas. So your brain says, "Let’s do something easier first," and pushes the big task to tomorrow.

Even though you remember the ice cream (or the party), your brain is tricked by fun now, just like how you might choose a small cookie today instead of saving up for a huge cake later.