There's a scene in 'Maria's Lovers' 1984, where Ivan (played by John Savage) burns his hand on a stove to prove his love. After we got home from the movie, my girlfriend said she would do the same for me. Of course the relationship didn't last, and wouldn't she have felt silly by that gesture? That's what's going on here. Add a bit of 'In the Realm of the Senses' and voila.