Everyone's gastrointestinal process and digestion speed is a little different, says Ganjhu. Alcohol doesn't necessarily cause diarrhea on it's own, but it can cause it in some people depending on what they drink and how it impacts their stomach.
"It's actually a bit cryptic how alcohol affects the gastrointestinal tract, and we're still researching how it works," says Keshavarzian. For example, new research shows that intestinal damage from alcohol may be worse if your circadian rhythm is disrupted — like in people who have jet lag, work graveyard shifts, or pull all nighters.
If you're someone who can drink all night without any disruption of your poop schedule, you may just have some intestinal advantage scientists haven't fully figured out yet. Also, you're #blessed.