Cleverbot, the 12th Doctor.
Annnnd... the fanfic writers are off to the races.
So you've searched this long and you still can't find the perfect sci-fi Valentine's Day card to impress that special someone? Don't panic. We've found even more awesome cards for you.
There's all kinds of Valentine's Day fun to be had!
Via Chris Bishop,
a song of ice and fire
Game of Thrones