Why can't I T-Spin?

So for the past few weeks my Tetris addiction has been getting worse. It all started when I experienced the joy of Tetris all over again losing something like 20-1 against Kevin. Dammit. Those new items in Tetris DS tripped me up, but I quickly regained my composure and starting kickin' some ass.

We have been getting bored of playing the normal way of just building up solid blocks, waiting for the star, and dropping back-to-back I-bombs until the other person(s) getschoked out.

Rumor of a T-spin came to us and today, we discovered a video on youtube that showed us how to do it. However, its hard to rewire our brain to build the way that "t-spinners" do. I want to do one of these so bad! Why can't I T-Spin?

T-Spin via YouTube