LOL. No, you don't. It just means you'll need to beef up your nutrition knowledge and very consistently execute it, eating a small enough surplus that you can gain size and strength without unnecessary fat, it doesn't take much. Not saying you should eat like a bird, or not enough to support your training and goals, but there's a difference between a well executed, smart gaining plan where you know exactly how much you're getting, versus an eye-balling eating-to-gain plan that's looser and not regulated. It depends on how much fat you're willing to add, and how bad you want to accomplish your goal. It's a slow and steady process. Then you can keep your physique and be super strong.