Like every day

Eric had lusted after the MILF next door for years but never dreamed that he would one day be in her kitchen fucking her. Yet here he was, gliding into her, sending those juicy tits bobbing as she threw her head back and moaned, urging him deeper, faster.
This was a one-time event, though. Eric’s girlfriend, who called herself B, awoke each day in the body of a new person in the city. She would find Eric and spend the day with him, lavishing him with money when she was in a rich body, and sex when she was in a hot body. The next day, the people she’d been inside would have vague memories of what they’d done. Eric knew this because some of them had approached him, uncertain how they knew each other or why they’d spent most of the previous day together or why they’d so readily agreed to have sex with a stranger. But something B did in them must have stuck because sometimes Eric found himself having sex with them again while they were in their proper bodies.
B didn’t mind. She had a loose attitude towards sex, as she would never have to face the consequences of any of her choices. She lived for the moment, enjoying the physical pleasure of her bodies, sometimes having sex with the wives and girlfriends of the men she became.
It was an arrangement that worked for the two of them, if for no one else.

While walking across campus one night, Rich finds a futuristic device that lets him clone his mind into the bodies of his friends in Clone U, available on Body Swap Stories, Smashwords or Amazon. Preview here.