The upper body is a balloon, representing love. The lower body is a commodity, just physicality, which represents sex.
I am telling a story based around this setting.
In this world, there is a girl looking for love.
By chance, she finds her own balloon.
The balloon hands its own string to the girl, and they begin a romance.
But the girl falls deeper and deeper in love with the balloon, moving closer and closer to him. The balloon feels pressure from her, and their relationship suffers.The girl wants there to be no space between them. She misunderstands between love and control.
Finally,the balloon bursts in her hands,and the girl lost her lower half, and becomes a balloon herself.