We all know the real answer: Because Mel Brooks thought a zipper on the Monster’s neck would be funny.
But the question being asked here is: Why would Dr. Fredrick Frankenstein design a monster with a zipper on his neck?
Upgrades?
It truly IS an enormous schwanstucker.
Ease of access when you start installing optional equipment.
That’s kinda what I was thinking, but what sort of equipment could you install in a neck?
A zipper on the back or the abdomen, I could understand, but the neck?
The monster requires a lot of food. The zipper saves time.