Back to the origin of the gallon...totally OT , a bit risqué but a funny story..
A good few years ago I was in a meeting with a female bank manager. During our conversation her phone rang, she apologised and,asked if I minded her taking call. I said ofcourse not.
She answered phone and a male voice replied to her greeting..
" I,m going to turn you upside down, fill your ##### with red wine and drink it"
She never flinched, went red or anything and simply replied
" you can drink a gallon then"
And hung up. To this day I,m not sure wether it was her boyfriend, husband or cold caller...but whichever she simply continued our conversation.