Why I decided to write my ending for "The Lady Or The Tiger"

I wrote that the tiger came out of the door instead of the lady as I wanted the story to have a sad ending, it can lead to a sad ending by making the princess sacrifice her life for the tiger not to kill the youth. I also made it quite touching as the princess loved the youth so much that she was even willing to sacrifice herself just for the youth. The king also regretted(sort of) for being so reckless and barbaric. Finally, in the final last paragraph of the youth, he was so sad that the princess had sacrificed herself that he got ready to kill himself.