Many lifters learn the bench press from powerlifters. And powerlifters certainly know a lot about it. But remember, their goal is to lift the most weight possible for one rep, and they often use special lifting shirts.
If your goal is to build size as well as strength, and you lift raw (without a stretchy lifting shirt), then your pressing form will be different. Here's a quick video lesson.
Christian serves up 3 innovative methods for taking your gains to new heights - one for biceps, one for arms in general, and a Bizarro World method that involves doing the opposite of everything you now do.