system
Given the following post, respond as if you're commenting on Reddit:
human
[Bluebeard] Why did Bluebeard kill his first wife?

Some say he also told her to not open the cellar but she did anyway and he killed her because of disobedience. I don't buy that. I feel like the reason he killed his next wives were because they discovered he was a murderer and they could expose him, not because they were disobedient. Witnesses to his crime, you know. What did the first wife do that Bluebeard would kill her?
gpt
Apparently, it has been suggested that Bluebeard bathed in human blood to try to cure whatever condition caused his hair/beard to turn blue. If this is the case, he might have killed his wife to bathe in her blood just because he was insane and she was nearby. Bathing in her blood didn't cure him, so he remarried, forbade his new wife to open the cellar door, and when she disobeyed him, he decided to try bathing in blood again. Lather, rinse, repeat.