magic cut & paste = swap

use case:
you want to swap 2 selections.
currently you can it do like this:
1. select selection A and cut it
2. go to target area and paste, not overwriting, then type a space
3. now select selection B (which is easier by using ctrl-w, therefore the space, to avoid that your freshly pasted portion A gets also selected)
4. cut, and remove the space
5. go to source area and paste - done!

or like this:
1. select selection A and cut it
2. select selection B and cut it - yes, read on ;)
3. ctrl-shift-v, get your A from there and paste it
4. go to source area, ctrl-shift-v, get your B and paste it - done!

while the second method is an improvement, this could be further improved:
Feature proposal to swap selections:
1. select selection A and cut it
2. select selection B and hit magic "swap"-shortcut to "cut selection, replace it by clipboard, and insert cutted selection to where clipboard was cutted" - done!

am I crazy? ;)
Sure, the IDEA would need to keep track of positions of cutting - but that should be possible, I think.