Culture...as with all cultures, it's regional. Common culture I've observed:
- when you jostle your opponent, ro they fall, or they take a painful shot, make sure they're okay.
- the fencing bum phenomenon - all spare money goes into fencing, before fencing, 10 people gathered around fixing their weapons and equipment.
- cheer for your teammates like nothing else, especially in the later bouts.
- sharing spare weapons is fairly common in a pinch.
- lefties are frequently damned.
- touches are conceded frequently. Without a director, fencers are fairly honorable about throwing out "dunno's."
I don't know too much about any other occidental martial arts (wrestling, boxing, capuera, etc..), but fencing definitely lacks the religious/ superstitious/ philosophical undertones inherent in a lot of oriental martial arts.