To remove the sheet from a sleeping girl, then proceed to ejaculate all over her back without waking her up. When done, put the sheet back over her and make sure the sheet sticks to her back. Then throughout the night your manlove will dry. Resulting in the sheet being glued to her back with your juices. And finally when she awakes and gets out of bed she will get up with the sheet stuck to her back like superman's cape.