'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
255
Couples' personalities converge over time to make partners more and more similar.
235
A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10
According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
14
A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
29
One in five long-term love relationships began with one or both partners being involved with others.
177