Most men can't multitask, meaning that if they are thinking about one thing, they can't think of another. If work is on his mind, then the last thing he will think about is calling his date from Saturday night. Or if he's parking a car, he can't carry on a conversation b/c he's concentrating on parking. Once one thing leaves their mind, they can think of another.
What do you think? Is it true?
I think it makes men seem too simple, but then again I think part of it might be true. I'd have to do some man watching to find out for sure, though.