Copy & paste in Poser doesn't work the way you would expect (considering the way most programs work, anyway). Instead of copying and pasting objects, it's for copying and pasting settings. For example, if you wanted to have one object positioned the same way as another, you could copy the position settings from one object to the other. You can also use it for copying and pasting morph settings, as long as both of your figures have the morphs that you want to use.