1970, I was 9 and on holiday with my parents in Calella, a big deal back then. I heard them, in the hotel room, talking and worrying about having too much alcohol to take back on the flight. So I decided to help them out.
I can vividly recall looking for my parents and staggering into the bar area near reception where I collided with some stools and fell. I'd drank nearly a whole bottle of Tia Maria and was taken to hospital.

Just the smell of that drink, or other sugary liqueurs like Glayva or Cointreau, makes me retch.