No you don't...trust me. You don't want to do it. You will find yourself right back here asking how to stop.
This is NOT a pro-eating disorder website. This is a website where people who think they may have an eating disorder come to get help. Vomiting after eating because you feel you are fat or want to lose weight is a very bad idea. It leads to all sorts of medical problems and leads to the development of an eating disorder which means your whole life can become obsessed with bingeing and purging (vomiting) and you are miserable. Just ask anyone on this website who's been there. Like me. Spent my whole life with an eating disorder and trust me it wasn't fun. Did I lose weight? Some. But then I gained more. Most bulimics hover up and down around the same weight which is very bad for your body. I have fifteen years recovery from my eating disorder and finally have a normal life (and am my ideal weight). Trust me. Just don't start. If you feel you can't help your wanting to vomit, get help. Talk to someone experienced with eating disorders.