Jacob had spent the last few months developing a rather interesting invention. It was a device that could warp reality itself. After an experiment in the morning, he spent almost the entire rest of the day getting reality back to normal. He had only just finished up as his girlfriend arrived. He knew he shouldn't have left the device on the counter. Sure enough, she picked it up and reached for a button.
He tried to stop her by screaming, "No, don't touch -- "
But it was too late. She had pressed the button and warped reality. Jacob looked over at his girlfriend; she had turned herself into a man. Meanwhile, the same warping had turned Jacob into a woman. He knew he could fix it; it was just going to take a while.