I took over this story about a scientist who switches bodies with a beautiful young woman. I've added a thread where the scientist asks Mandy if she wants to go try out his body or must he keep her strapped down while he tries out her body.
I've added threads here. Mandy agrees to try out his body while he takes hers. But she has something in particular in mind. In the next threads, they start having sex with each other.
In my latest threads here, Mandy and Karl the scientist continue fucking each other after exchanging bodies. Mandy is amazed by what she's feeling and Karl has his first female orgasm.