After a lifetime of using "normal" scissors left-handedly, I bought left-handed ones and found I couldn't use them. I was too ingrained in the weird (and painful) twisted way one needs to hold "normal" ones.
I was the only 'corrie-fisted' one in our church badminton club, so although they were accustomed to the different style of a left-hander, I wasn't. Until the team began visiting other clubs and I met my first 'cack-handed' opponent and was demolished.