In one example embodiment, a method is provided that includes interfacing with one or more end users via a central website and managing information related to one or more of the end users. The method also includes determining a personality type for one or more end users and matching end users based on relationship rules of the personality types that outline compatibilities between the personality types. In more specific embodiments, the determining of the personality type includes an evaluation of a hand of a selected end user. The personality types can be based on inferred levels of testosterone, serotonin, or estrogen. The personality type determination can also be made based on a set of questions. The personality type determination can also be based on evaluating a selected end user's word choice and/or the frequency in their word choice in their writing.