The scene from 'Chapter 1: The Compleat Angler' features Stacy Martin and Sophie Kennedy Clark as Joe and B.
B goads her friend into seducing a young man on a train with the promise of chocolate.
Nymphomaniac stars Charlotte Gainsbourg as a woman who recounts her sexual history to a man (Stellan Skarsgård) who finds her badly beaten in an alleyway.
Uma Thurman, Willem Dafoe, Shia LeBeouf, Christian Slater and Jamie Bell are among the other cast members.
Nymphomaniac will be split into eight chapters across two films.
The movie's world premiere will be held in Copenhagen, Denmark this December. UK and US release dates are yet to be confirmed.