Don't forget that when Galadriel asks Gimli what he's going to do with the hair, he says that he'll set it in crystal as an heirloom to remind everyone of the perpetual friendship between "wood and mountain", .i.e. Elves and Dwarves. In other words, not merely an attraction or a courtly thing or whatever (and BTW, there's nothing "mere" about courtly love, either, the knight had to go off and do any ridiculous thing the beloved asked and in the mediaeval romances they wanted some totally absurd things!). It's a case of, "We've been enemies a long time, lady, let's make it up." And then she prophesies that gold will flow through his hands but have no control over him (almost "un-dwarvish"? "We don't really love gold, we just say that to get it into bed" to paraphrase Terry Pratchett).
