A favorite of mine is a scene when the two main character first meet, in a garden after dark, and he puts a cigarette in his mouth to light. Greta slowly takes it out of his lips, never breaking eye contact. She puts it in her mouth, her black/red lipstick smearing obviously on the cigarette. She keeps it there for a few minutes (this scene is long :)) before handing it back to him, putting her lipstick on his lips. He sighs and is elated simultaneously by this action. Looking intoxicated, he finally goes to light the cigarette and she blows out the match. Ardent silent-movie kissing ensues. It's so deeply passionate, with such little effort. Modern films, take note.