Example is in order.

The old Poser female hand for instance left and right with a strap between them saved out as A Poser Prop and reimported into Poser as props to be used as a fantasy bra.

Character figures can't be saved as Prop files....I think...but if I export the hands seperately and then parent them as imported .obj files to a strap primitive and then save it as a prop file I can reposition the hands individuall on the strap Parent as needed for furure breast movements.