I HAVE BEEN WONDERING THIS SINCE I WAS FIVE YEARS OLD YOU HAVE SOLVED SO MANY MYSTERIES
Stitch literally fell in love. Not romantic love, but family love.
This is so interesting. Instead of trying to forcefully stop or restrain him - even though Lilo is fully capable of and willing to get physical as we saw with Mertle/Myrtle/What’sherface - Lilo gently showed him love.
And it worked.
i always thought maybe it smelled nice and it calmed him down
and he suddenly knew that if she killed herself, he would die. Maybe not immediately, maybe not with the same blinding rush of pain, but it would happen. You couldn’t live for very long without a heart.