If someone doesn't begin to go through puberty by age 14, there is something medically wrong with them.

False, if someone doesn't begin to go through puberty by the age of 14, there is NOT something medically wrong with them. Puberty differs from individuals to individuals.

You did not show us the image of the burger, but i shall try to answer as best i can.  when purchasing food, always consider the ingredients as well as the person who prepared it. consider if they were hygienic people or not, in case the burger was infected with bacteria. no mortal should place an infected burger into their mouth.