"I don't understand..."

I don't understand. After the last child was born, my wife told me we had to cut back on expenses - I had to give up drinking beer. I was not a big drinker, maybe a 12-pack on weekends.Anyway, I gave it up but I noticed the other day when she came home from grocery shopping the receipt included £45 in makeup.I said, "Wait a minute I've given up beer and you haven't given up anything!"She said, "I buy that makeup for you, so I can look pretty for you."I told her, "that's what the beer was for!"