He's right. I'm a lefty as well but I play left handed. It's all a matter of preference. As a practical matter though, if you learn right handed, you will have way more guitars to choose from in any retail store, and you will more easily be able to borrow someone else's instrument in a pinch. Also, I used a racket ball to strengthen and stretch my fretting hand. It made a big difference. However, I would shy away from those grip master devices you see in the music stores for hand strengthening. I actually irritated a nerve in my thumb using the 'extra light' model.