Options? Oh, please. They already have the cheapest, safest, most effective of all methods, to wit: Vasectomies, you can retrieve and store sperm easily and cheaply, there are methods that are easily reversed, like a new method that uses a polymer plug that can be dissolved with ultrasound. Sperm can be removed without reversal, using a method that is used on corpses. Yeah, you read that right. Some folks, generally parents who want grandchildren, will use this method to get a post mortem grandchild. Creepy, innit?