Question of the day : Guys what could be the reason why we Guys don't put our Girls on our will? lol

Paul Walker who dead of recent willed all is Wealth to his Daughter, almost $25,million and left nothing to his Gal friend! But what could be the Reason why he didn't put his Gal Friend on His will? Or are there anything wrong putting Gal friends on our will? Guys what do you think? But imagine the Gal that break your heart yesterday happen to be on ur will!? Lol Omg