is it normal to drink an entire 5th of spirits?

I drink either 1x a week or 1x every two weeks. Never more, never less.

but when I drink I will usually finish an entire fifth or even sometimes a Liter of whatever spirit I am drinking. Usually Grey Goose, Jack Daniels, Jameson or Hennessey.

I start at around 7 pm and will finish around 3 am whereby I usually just fall asleep. I dont get blackout drunk etc but my body usually tells me its time to call it.

what damage am I causing my body? or is this normal to drink this much when drinking infrequently.

I am 6ft2 and 218lbs
I appreciate well thought out subtle trolling.