You haven't seen how some of the folks I play with roll.

Maybe the real Cthulhu was the impossibly mind-breaking irrational thought experiments we subjected ourselves to along the way! :D

I try hard to only roll my old fair dice on felt (in the past) or plastic (since 3d printers). They work by having hard corners, those wear down making the dice less fair when rolled on surfaces harder than ABS

I guess if your dice were pre worn by polishing you can't make them worse, and fair polyhedric dice are pretty much no longer available

Online dice simulators are probably fairer still

Roll my number, roll my number, roll my number, I'm not afraid...

Louis Zocchi - The guy who made fair polyhedral dice - reckoned the problem is that polyhedral dice become unfair through the edges being rounded so they roll more easily from some sides than others and they become less than square/round

This is an old video from him about why dice suck

I did this with d6. I am a master at rolling low, cursed you may say but if I pick up a 1 the chance of rolling another one is lower. Or at least in my mind and memory.