I DO think there ahould be an OPEN search area, Like Google. Where you can put in a key word & it will search it out.
POF has an Interests LIST: where you can enter a 'comma delimited' list of Key Words that act like an Index.
ex: couples, swingers, swappers, fmf, speling bees, pez dispensers, trekies, chess, Monet,
PS: these interest items become Links to others interested in same.
ex: listing Women as an interest will hook you up with other guys and gals interested in Women. ☺
PS2: Advanced search offers the ability to enter 1 Interest Item as a filter condition; so Geo, Age, etc..
constraints can also be applied.