They cheat because Haitian Society say's that it is normal.
Haitian men grew up watching their father's cheat on their mothers.
Haitian women were raised to tolerate this behavior by their mothers.
When Haitian's leave Haiti for the real world they see that other societies don't accept this behavior.
There are laws against this hypocrisy and reprisals are in order here in the states.
Bibically speaking it's against God's laws. Most Haitians are Catholic and don't read the bible.
Since they think its normal to cheat they do so without any hesitation or thought.
Good upbringing by both parents with the father giving special attention to their sons not to cheat would help bring decent God fearing and law abiding men in the future.