"Ring of silver, we need to talk".
All of a sudden, Josh's old body stopped yelling and composed itself in Josh's chair.
"That quick? You're an indecisive one" the ring responded.
"Not necessarily, I forgot to ask a question. Can I switch other people's bodies or only my own? Seeing someone in my body is amusing, but it might be interesting to watch someone who tends to be a little less... loud."
"In a way. I can't swap random people at will but I can use your body as a medium to achieve the same results. For example, if you wanted to see your mother and sister switch, I can swap you back into your old body, your old body into your sister's body, then your sister's body into your mom's body. That way you will be your mother, your sister will be you and your mother will be your sister. I can also brainwash your mother into thinking she has always been your sister to alleviate any added confusion. Or hell, we can leave both of their minds intact and watch the fireworks."
"Interesting. I don't want to have all of the fun today. For starters, can you arrange a few swaps so that James is now in my original body instead of my mother and my mother believes she has always been James? He should be easier to manage."
"Not a problem!"