You'll have to 'cement your gains'. That means you'll need to continue doing Penis Enlargement in one form or another for X amount of time. I haven't reached my goals yet so I haven't looked into the specifics of cementing but do a search for that term and it should give you an idea. As with all things Penis Enlargement, it'll be different for everyone. But no, you shouldn't have to be doing Penis Enlargement for the rest of your life unless you just want to.