Lastly, number 1 - while it is true that cold sores, a form of venereal disease, are very contagious, mouth ulcers have unknown origins, but even more concerning is that most people don't know which they have. Open flesh, regardless of cause, should never be allowed to come in contact with another person. The risk of biotic contamination is always present in varying levels of severity. Treat a mouth ulcer as possibly contagious and avoid contact with others until it has receded.

Number 3 - sticking your finger in your mouth for a cut is not a serious problem. Seldom is our own body unaccustomed to the bacteria in our own mouths, however, having someone else do likewise could be a problem. There is a valid reason for doing this. One of the greatest fears is a serious threat from contamination in the wound caused by the instrument creating the wound. If it is a puncture type would that can drive contaminants deep into a cut, things like tetanus and other anaerobic bacteria become a concern. The body naturally bleeds and the blood flow cleanses most wounds by washing the area and pushing contaminants out of the cut. The deeper the cut, the harder it is for small blood flow to purge the contaminate. Creating suction with the mouth, similar to a snake bite, is helpful in such cases and, similarly, so long as there is suction has almost no chance of allowing contaminants to enter the wound.

Number 5 - I can't say about chocolate or greasy since I have never seen a study done on them, however, the inclusion on this list seems to be implying that acne and food consumption are unrelated which is not true. Acne is poorly understood. It is a bacterium. How it gets to the skin, what goes is to grow and flourish and how to control it is an inexact science, but to assume diet is not relevant is simply wrong.

This is not a great list. It has some truths, some assumptions and some errors. Please don't take these lists as facts any more than reality shows deal with reality. It is certainly possible to get a contact lens behind your eye. I will grant you the conditions that would allow it are very rare and dangerous, and they aren't likely to "slip" back there through anything natural, but there certainly is room and conditions could allow it to happen. Also, if it happened, you wouldn't have to wonder about it - you would be in immense discomfort.

Number 8, the answer would indicate someone who neither understands the difference between live, modified live and killed vaccines, however, all live and modified live vaccines have some live elements survive the procedure - all of them. The only time someone reacts is when they have extremely high sensitivity to the virii, typically people with immune system deficiencies or weaknesses. Killed viruses are also not immune to accidents; however problems from killed vaccines are exceedingly rare.