Perception of the physical world does not necessarily result in a universal reaction among receivers (see emotions), but varies depending upon one's tendency to handle the situation, how the situation relates to the receiver's past experiences, and any number of other factors. Feelings are also known as a state of consciousness, such as that resulting from emotions, sentiments or desires.  People buy products in hopes that the product will make them feel a certain way: either happy, excited or beautiful. Or, they find the product useful in some way, even indirectly such as to support a charity or for altruistic economic reasons. Some people buy beauty products in hopes of achieving a state of happiness or a sense of self beauty or as an act or expression of beauty