Can a serial killer go around killig people just because he wants to? He has no reason for doing it other than he likes to kill A rich man robs a bank just for more money. No other reason than to simply get more money to add to his already full bank account. I know the question is weird but i wonder can characters/villains just do things just because with no real reason behind it? Why or Why not? I ask this because ive come across so many movies and tv shows, especially movies where characters and villains do things just because. Especially heist movies where wealthy characters rob casinos or banks just because they been doing it for years and thats how they got rich in the first place. Like there are never any "real" motives behind the things these characters and villains do.