I don't stick my finger down my throat but i puke when i pretty much want?

Nice trick!: You are not unique--many children and adults alike can relax their lower esophageal sphincter on demand. This is seen in ruminators (people who regurgitate, rechew, then reswallow their food), in some eating disorder patients, and in sword swallowers. But repeated exposure of acid stomach contents to your esophagus, throat, teeth, and mouth can cause significant injury (short and long term).