How many units of alcohol do you actually drink per week?
I would have said usually 20-25, but I've tracked them for the first month of the year and it's more like 40-50. That's without any big nights out. A bottle of wine shared with the missus on a weeknight, that's six units. Four pints in the pub on a Thursday evening, that's another twelve. Add two on a long dog walk at the weekend, another six. Another bottle of wine at dinner on a weekend evening, another six. Add a couple of drams of scotch spread over the week for another eight units. That's 38 units without even trying.
Not every week includes all of the above, but it could be an unremarkable week where I don't feel like I've drunk heavily.
If I go see a band or watch some sport, which happens once a month or so, I could add another 20 units quite easily.
If I was away on holiday I'd probably do four or five pints, plus wine with dinner, plus a nightcap most days. That could be 25 units a day.