Has anyone else never thrown up from drinking?

So I have thrown up only once from drinking and that was in highschool. Crazy party, I end up chugging a 40oz of rum (I’m sure just about any human being would throw up from this). But that is the only time ever. I am by far the most heavyweight drinker out of anyone I know. I can mix wine, liquor, beer, all of it in the same night and wake up fine. No hangover, no puking. Is this a genetic thing? It can’t be a good thing, because throwing up is a natural defence mechanism right? Does anyone else experience this?