Because we not only Get Something we Wanted to Get or Go To Some Place We Wanted to Go - but it makes us feel 'Loved' or 'Important' for The Person who Prepared the Surprise for Us! 😁👍

- They had to put some Time & Effort in Preparation

- & Most of All: they Had to Know Us Well Enough to Know 'What We Want' - & 'What Would Make Us Happy!'  ^_^ 👌

*Also: A 'Surprise' is Something Unexpected - so we don't know that we will Get it a Given Moment - which Only Increases the Happiness when We Get It! 😤

- A well Prepared Nice Surprise can Make us HAPPY for The Rest of The Day! :)

( or Even Longer - because We Create 'Good Memories' connected with that Moment - that May Last for Many YEARS!  ^)^ )