Long-liver secret

A journalist is interviewing a long-liver.
- You don't smoke, do you?
- Well, I smoke 3 packs of cigarettes a day.
- Maybe, you don't drink alcohol?
- Well, I drink a bottle of vodka every day.
- How come you live for so long?
- Well, I've never ever argued with anyone about anything…
- But, it's impossible!
- Totally agree with you.