 Visit fatherhood.gov to hear more. Brought to you by the U.S. Department of Health and Human Services and the Ad Council. If you're a guy turning 18, you need to register with the Selective Service System. It's the law, and we wanted to make absolutely sure you get the message, so we brought in someone we knew you'd pay attention to. 50 push-ups! Uh, hey, Coach. Get on that computer! SSS.gov! Not fast enough! 50 jumping jacks!