people in love are literally acting based exclusively on emotions, utterly without logical input. In many ways this is similar to a manic state. Mania can heighten feelings of connections to others and may make the person suffering from it feel a sense of the interconnectivity of the universe. Someone who is manic may feel a sense of euphoria; they may be hypersexual or exaggerate expansively. All of these elements of mania are at least vaguely related to what is generally associated with the behavior of people who are in love. However, mania also comes with other symptoms that are not consistent with those of falling in love. When someone is manic they tend to be irrational, easily distracted, more active and talkative than they normally are, have less need for sleep and be prone to flights of ideas and grandiose statements.