the best examples of this are probably the following
no one can give me a chinese burn to the extent that it gets too much
I can handle long nails digging hard into my skin
I can take a lot of punches
I often ask people to do those things to see how far I can push my pain threshold before I have to ask them to stop
I didn't react to "smacking" when I was younger in quite the same way as other kids my age would... I would just shrug it off and think to myself the pain will be gone in a bit of course combined with how stubborn I can be it never worked because I had the theory that my dad would eventually give up when he realised that it wasn't changing my behaviour
Also when in primary school I was physically bullied a lot however I would never let the pain show in my face as I didn't want to give them the satisfaction of knowing they had hurt me of course this just resulted in the bullies saying that I was crying on the inside instead
I guess my higher than average pain threshold could be a combined result of being hit/smacked at home/school