CARLA: OK you can wank looking at our arses if you like, just shot your load in a sample cup....
MEL: Err, Carla, we have no sample cups, we run out, used the last one with the ballbusting wanker..
CARLA: Oh, ok, you'll have to cum over me then, aim at my pantyhose crotch, the mesh and webbing will catch enough for what we need..