All I remember is that Spike had Xander chained or handcuffed or something to a bar that went accross the door. Xander had a butt plug in and every so often Spike would come up to him  take the butt plug out and...well...you know.  *blushes* Xander had been there for quite a long time hours and hours or maybe even a day or so.

Does anyone know what fic this is?