Why do I get drunk so easily on so little?

Had a good dinner. Nice big steak and aspagus with maybe 1/3 bottle of red wine. Fairly big guy. 6’3 250lbs. I am absolutely buzzing off that little bit but it goes beyond that. 1 or two shots and I’m am slammed. A full pint of beer and im buzzing. I enjoy alcohol but limit myself due to how drunk I get quickly. I dont why my body does this. Any ideas?