Questions for design thinking can be found anywhere, here a post from a friend: 

(very) free translation: 

I've cut my finger. Can someone forbid these 'brilliant' opening systems of tomatocans?  

The problem is probably familiar: some years ago the can opener - almost  - disappeared from the kitchen as the cans got an opening system. But it is really difficult to open it with this 'pull'-system (see top of this can as an example).

Would love to research people opening cans and prototype & develop a better design solution.