Because there’s a socially acceptable acceptable age for some things… How would you feel if a fat, bearded, 40-something man like me came to your house trick or treating, no kids in tow, just me by my lonesome?
I’m not saying don’t have fun as an adult. God knows life is mundane enough. You want to dress up for Halloween? Go ahead! I know I will be! There’s just something off putting to me about adults going door to door begging for candy. I’m just saying it’s kinda weird.