Similar to Social Networking with the singular exception that you would use social nutworking to take a load off of your nuts. You can social nutwork on practically any social networking page. Social networking is the new singles bar where social nutworking can take place.
If you go look at your girlfriend's social networking page, you can often times see the guys that used her for social nutworking in the past.
If you use your social networking page for social nutworking, you should clear the photographic evidence once it's done.