You know you can just gulp down air as well. It's possible, and I've basically mastered it. Not at least until well after you've reached your 'full' point. So as you blow, it really feels like your entire gut is your stomach. I definitely stretched my abdominal wall muscles when I was playing around yesterday. I assume it creates more expansion space to fill.
Sandra. Age: 23.
I started out by trying to get the hang of that one technique that the girl on YouTube tries to teach -basically the same base principle but hers tells you to use your tongue as a piston by rapidly moving it.
Braelynn. Age: 26.
It won't immediately fill the entire space, sometimes it takes a few goes especially as you get fuller. Want more pressure in your upper belly? This thread reads like an ad on a home shopping channel Oh God, to try that on an unwitting person!