another way of doing it.. is...
go to MongKok's Ladies Street night market (Tung Choi St.)
there's a few stalls that sells kinky costumes.
buy a few sets (get more, can bargain more!)
choose any WG.. be it HG or walk-ups..
most WGs will be happy to put on the costumes for you without any extra charge...
it's something new for them, they will probably enjoy it as much as you do..