TdeV1,
With your extended description, I see now exactly what you mean. I face similar situations frequently, where I have multiple paragraphs that I need to paste into a single element, then split each paragraph into its own element.
Unfortunately, FM has no native functionality to automate this, despite how it must be reasonably common need. In my case, I am an FDK developer and hacked together a little plugin that does it. ExtendScript could also be used. If you don't want to do programming, then the other option is a conversion table. You would have to paste the content into a completely unstructured document, run the conversion process to structure it, then copy the newly-wrapped elements into your DITA topic. You can't run the conversion process on a document that currently has any structure.
So to sum up, you need to either do some programming/scripting or learn how to build a conversion table. If the latter interests you, look up conversion tables in the Structure Developers Guide. In this case, it would be an exceptionally simple conversion table, maybe even just a single row. If you have to do this process repeatedly, I think it would be worth your time to investigate.
Russ