In Korea, there's a man named Lee Jin-gyu who fell in love and married his life-sized Japanese body pillow (called a "dakimakura").
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
In 2010, Gary Richmond was beaten into a coma. He woke up with amnesia and no memory of his wife of 20 years. Subsequently, he ended up falling in love with her all over again!
A couple had their wedding rings engraved with a waveform of their own voices saying "I do."