Well, do you have to go, or don't you?!

Why is it that when Jasper starts to whimper to go out in the middle of the night, when I get there he is laying on his back against the farthest wall of his crate and won't budge. So, I have to stoop down, reach in, and haul him out to go out? Wasn't it his idea to wake me up? Quit messin' with me!