They’ve already told you what they wanted. You spend hours on coming up with a costume for them, weeks even. By the time Halloween comes, they change their minds. You’d probably be tempted to spank them.
As the parent, you’re the one who has to inspire the Halloween vibes into your kids. However, they won’t be so keen on playing dress up if you’re not up for it either. Hence, you’d have to play along. That means you’re going to have to put in additional effort. That’s all because you love your kids so much.