Using your teeth as an opener when opening soft drinks, is wrong and could have a damaging effect on your tooth. Also, eating bones in other to improve the strength of your tooth, is also wrong. Crushing of bones don't make tooth strengthened. It's the availability of calcium incorporated inside your system that performs such function.
Spending hours in bathroom and using expensive soap to scrub your body, does not affect how you look, it's the kind of nutrient from the food you eat that does such function, largely.
Most expensive creams contain hydroquinone, that you do not see it written as hydroquinone does not mean it's not inside there, there are over 20 other generic or scientific nomenclature that it could be named. However, the chemical in itself is not bad but using a higher percentage of it can make a person susceptible to its side effects, including skin cancer.