This is hilarious. How can you ensure monogamy with a fictional character? Would you have to pay the creator for exclusive rights? Would the creator be next of kin? How would the mechanisms of sex work in a 2D world, or between a 3D person and a 2D character, other than cutting holes in the paper?
2D Love? Does that mean you can “make it” with characters from Edwin Abbott’s Flatland? Forget it! I hate angular women!
Maybe it means you can get it on with the inhabtants of A.K. Dewdney’s Planiverse. But I find them even creepier that Abbott’s triangles.
And Eck, from The Outer Limits episode Behold, Eck! isn’t any better. Besides, Eck cut a tower in half by passing through it.