Billy pressed his anus against Mary's open vagina. Billy cared a lot about Mary, so he wanted to make sure that the seal would be air-tight. Billy began pushing the feces out of his sphincter, while gently kissing the back of Mary's neck. Billy liked to imagine that his anus was a spaceship, and that Mary's vagina was also a spaceship, and that Billy's feces was passengers and cargo being transmitted from inside one spaceship to another. Mary liked to imagine the same thing. Mary cooed lovingly as Billy squeezed all of his feces into Mary's vagina. Billy was pretty sure that he was in love with Mary. Mary felt the same way about Billy. Billy and Mary could be observed star docking about 17 times a week on average.