>>94326195Shion could do the opposite too, making release impossible. Actually I think that's more likely scenario for her...
Roboco would have very fine motor control, able to perfectly tailor your experience together. She would be the ideal partner if you don't mind some parts of her being made of metal.
As for Choco, don't men just surrender immediately to her no matter what she does because she's a succubus? That would be pretty sad for Choco now that I think about it. Cursed, never to have a satisfying lay.