@kwendy
I don't see why you'd want it back.
Things between Kobayashi and Tohru only got steamy with sexual undertones when "she?" had it. Kobayashi was only shown to have a physical interest in her when she had it. This has negative ramifications for their relationship as a whole.
Imagine if a guy had a girlfriend, and the girl was never attracted to him. When a magician gender benders him into a girl, now the girl's all over him in a physical sense. Wouldn't that ruin all the buildup the relationship and just add a sour undertone to the relationship once things returned to the status quo...