"Uh, you want to be my jockstrap?" asked Steve, Jessica's boyfriend, hastily summoned by cellphone. "Just for the weekend." Jessica murmured. "My mom's got this machine that can turn people into anything. My bro's spending the weekend as her bra." "That's really weird." said Steve. "I'll sweeten the deal. Next time I go to the beach, you can come along as my bikini bottom. Or top, but I know you're a butt man." "OK."
Jessica's mom hit the machine's enter key. Jessica felt herself suddenly losing her physical body. Her consciousness persisted, but how she felt things as a piece of cloth was only remotely analogous to human senses.
"I'll give you two some privacy." Jessica's mom leered. "Take good care of her, and wear her the whole weekend. She's set to turn back about 10:00 Sunday night, so have her back by then." She left the room. Steve undressed and gingerly put on his girlfriend-turned-athletic supporter.
Jessica felt the most intimate contact she could imagine with her boyfriend's penis and testicles. She discovered that she could tighten and relax her fibers, and thus keep him sexually stimulated.
Jessica didn't hear it, but Steve muttered "Damn girl, you are almost as good at being a jockstrap as you are at fucking."