The real answer is :

"'Cos I'm a bloke. We don't think like that for fucks sake. It's in our genes to mate with as many females as possible and that doesn't involve wining and dining."

A better answer would be :

"Sorry dear, my mind is doing overtime at the moment with a problem at work. Let's go out for a drink down town and get leathered? Oh, ok, how about going out for dinner... McDonalds yeah?"

jixi