The pillow that is shared betwixt the legs of two individuals in a mutual sleep agreement. It is placed between the legs of the two participants in the spooning formation. The mutual mount has been known to save relationships from the depths of mediocrity as well as foster the bond no other pillow could produce.
Him: Honey, I don't know. I'm just so tired tonight.
Her: Come on, I've got the mutual mount for us. (Mutual mount is positioned)
Him: I don't think I want to break up with you anymore.