There is an app out there that is highly restricted, but for enough money it lets you change bodies with an "instructor" who will exercise your body while you hang out in their body. You regularly trade with a 65 year old woman who was a professional belly dancer. You endure an hour of arthritic pain in her body so she can feel young again and practice belly dancing in your body. It's a nice trade off. She gets an hour being young again while she exercises your body and helps tone it up. With her help, she has really tightened up your body. When it is time to switch back something goes wrong! A phone call from grandson interrupted the transfer. Now a teenage boy is stuck into the body of a beautiful belly dancer. He pleads with grandma to contact the app company to switch them all back in their bodies. While he waits he might as well explore this new body. He "finds" a diido and gives the new body a ride. Talk about the strangeness of something being inserted into you. You find it a little uncomfortable at first, but it quickly turns pleasurable. Talk about how strange you milk filled bouncing boobs feel as you bounce up and down.