Originally Posted by
VonHammersmark
He made a good point though. Some materials are extremely resilient to blunt force while being easy to puncture/cut/scratch. For instance, if you take a sledgehammer and hit a rubber tyre with it, you won’t break it but you can cut a hole in it with a sharp knife. That’s because rubber is very tough but also quite soft, just like Wonder Woman’s flesh. Toughness and hardness are not only two different properties, they're inversely proportional so Diana’s weakness to sharp objects actually makes more sense than people realize
Still, I think a curse would be the easiest explanation for it. Just say Circe laid a curse on Wonder Woman, or that Hecate built a kill switch into her