There is a way, and you can find it at: http://themagicvine.com/id58.html
You can't
When they had a surplus of a commodity, they offered to swap it for a commodity they wanted which someone else had a surplus of.
this is only done in the movies!!!!!!
Body swap carries the connotation of being voluntary, whereas switched bodies is more reminiscent of accidental body-swapping.
You can't yet with currant technologies and it is unlikely to happen any time soon. Also there are no known ways to swap bodies with magic either (I will not debate magic's existence ).
There are no magic words to switch bodies. Magic is purely make-believe.
Sorry, much as this is a great plot in books, television shows and movies, there is no spell, ritual or other way I know of to switch bodies with someone else.
Giving something, getting something else back
This sounds a bit like Surrogates with Bruce Willis
Google Family Guy Body Swap
Swapping bodies is not possible in reality, only in fantasy fiction.
ask someone to swap.