Using alcohol mathematics is a simple formula;

"I've had eight beers now and I feel really good ..... so if I have have another eight beers I'll feel TWICE as good!"

It gets worse when combined with a work day, figure this;

(I've used USA names in keeping with the American flavour)

Dirk; Hey, it's 2am .... don't you have a presentation to the board at 9
T-Bone; Yeah, but I figure I'm going to drink till 6, have a shower and breakfast, then write the presentation between 6:15 and 7:30, and that gives me an hour and a half to get to work by the public transport system (note the responsibility shown) and finish rehearsing on the train
Dirk; Boy, T-Bone, that multi-million dollar contract is in the bag .... another double bourbon?