Almost without fail, every night when I get into bed with DH, he's alarmed and demands, "Who's that??!" I usually ask him who the heck he was expecting in his bed.
He also has a great talent for sprawling himself completely across our king-sized bed. When asked to move over so I can get in, he tells me in a very aggrieved voice that he is already perched on the VERY EDGE of the bed, clinging on for dear life, and if he moved at all then he would fall out. I've tried telling him to roll in the other direction then, AWAY from "the edge" of the bed where he thinks he is. (I don't care which side of the bed I sleep on. I just need him to move from the exact centre so I can squeeze in SOMEWHERE.) That doesn't work either. Apparently he is on the VERY EDGE of the bed on both sides.
He even maintains this in the morning, that I am always pushing him out of bed.
I did have revenge once, however. He woke me up by trying to shove me out of bed, complaining at length that I was pushing HIM out of his side. Apparently he was in danger of falling and was just trying to stay in the bed. Rather than be pushed, I got out, walked round and got in on his side, telling him he could now roll into the middle of the bed as he wanted. "Huh!" he said, rolling quickly and angrily further in the direction he had been pushing me. Of course, this caused him to fall out of bed, because he was already so far over on that side.