Answer:
You do not want me when you donโt have me, but when you have me you donโt want to lose me. What am I?
I have a name written on me, but it isnโt my name. Men plant me, but I never grow. They look at me and see their future, rotting in my bloom.
Canine children.
I have thirteen hearts but no body or soul.
A little pool with two layers of wall around it. One white and soft and the other dark and hard, amidst a light brown grassy lawn with an outline of a green grass. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.