His films like 'Jules and Jim' and 'The Woman Next Door' are quintessential explorations of romantic entanglement and the emotional complexity of three-way relationships.

He repeatedly examines desire, jealousy, and passion between multiple characters in works like 'Live Flesh' and 'The Skin I Live In,' bringing emotional intensity and nuance to triangular relationships.

His visually poetic films like 'In the Mood for Love' and 'Fallen Angels' deeply probe unrequited love and romantic conflicts between interconnected characters with lyrical precision.