1. A method for pairing members of an online social network, the method comprising: (a) for each of a plurality of members, receiving one or more images that include a face of that member; (b) receiving preference data relating at least a portion of one or more facial images to which a first member is attracted; (c) from the preference data, determining a numerical representation for each of one or more reference facial features to which the first member is attracted; (d) selecting a first preferred group of members by comparing numerical representations of facial features of each of the plurality of members to the numerical representations for the reference facial features; and (e) providing to the first member one or more members of the first preferred group.