By skyforbes There was a scene where the MC was dating a girl, they went to his apartment and starting cooking together, accidentally he dropped the lobster they'd cooking, but they both started to laugh and in that moment he felt a great chemistry with her.
That relationship didn't go that well so they split their ways, but every time he was dating someone else he tried to do the same thing, they would go to his apartment, cooking the same dinner, and he always dropped the lobster to the ground, hoping he would have the same chemistry he had with his previous lover.
Edit: yeah it's Annie Hall, thank you mates