Err, not sure if it will be much use to you given i'm a bloke.
I started making myself since I was 14, yup, the age were most people are there most vulnarble, worried about their apperance and what others may think of them.
I became isolated and depressed at school and ate, alot.. Eating made me feel better but quite soon I felt guilty so I started throwing up. So, i've been doing that for 4 years (with periods of stability where I stopped followed by a re-lapse- I had stopped in feb05 and started again on the 21st of dec 05).
In the four years i've done this people have said i've lost weight, I keep doing it, and my folks don't know and they comment on what I eat and call me fat (i know its jokingly) but when that happens I binge and throw up.
If you want to link this to bullemia, think of a time where you have felt isolated and not in control, imagine watching yourself from above (as if an outerbody experience) doing something you don't want to do but can't stop it).
Also, if you've drank whiskey/vodka/40% drink and it burned you throat, thats the feeling you have in your throat after doing it.