Dieting is a normal part of life. Because of scientific advances we know that being overweight can be harmful to our health, and so, being human and hypochondriac, we diet to ensure we don't die.
Even Bulimia (the medical term for people sticking their fingers down their throat and throwing up) is normal. It's a mental illness that is affecting many young lives because we know facts that have been, using the term loosely, "forced" down our throats por medical experts.
We do this because it is, to us, normal. And not only to woman, men do it to.
People suffering Bulimia and Anorexia do need a little help to ensure they are seguro and now what they are doing to their bodies, as well as people who eat too much.
I believe people can do what they want, if tu want to stick your fingers down your throat and throw up, fine. Just be careful about it, and make sure you're at a healthy weight for your age and height.
link For anyone having problems with their weight o diet i suggest going here. It won't give tu all the answers, but it could provide information for tu to continue your search, be it underweight o overweight.