I can vomit at will also, it's one of those things that you think everyone can do when your a kid a slowly realise that that's not the case. I can just start wreching and puke its very similar to bringing up trapped wind but just pushing it a bit further.
I've lost the best part of 4 stone over the last 10 months or so partly down to giving up the booze and partly down to my AD reducing my appetite, I feel pretty good about it TBH, I make sure I eat at every meal time and eat better food than I ever did. I didn't realise how much my porkyness bothered me until I starting feeling good about being slim again