little to no affect from alcohol?

why do i gotta take atleast 8 shots of something around 40% to feel anything ive drank twice in the past 2 years so i dont have a built up tolerance. i took around 8 shots and got a lil giggly and slightly less precise with my movements but nothing else but seen someone else do a similar amount of the same stuff and they got shit faced also i drank it all in like an hour long time window. gonna start making bets and make money off my natural tolerance