Well, freak. I pressed enter by accident. As I was saying... If you pinched yourself and it hurts.. does that mean you are weak because it hurts.. or your finger muscles are super strong?
I think that t will always hurt because your fingers will always be as strong as the rest of your body, (given you take decent care of it), because if you fingers were stronger than your leg of your other arm or something, than it is definately very weird.
it depends where you're pinching your skin, for a lot of people, the sensitive area hurts the most (eg: skin around the mouth, eyes, eyebrows.) or if you had a past cut on where you're flicking, it might hurt too. or if you have strong finger muscles too.