Jack hadn't initially minded swapping bodies with his secretary, Kristen. He actually found being a woman sort of thrilling and invigorating. Of course, it didn't seem to take too long for the power of being in his body to go to Kristen's head. She made him do all manner of humiliating tasks, then one day she decided to spank him. He threatened to sue, but then she told him she'd just swap back, leaving him to deal with the lawsuit. He threatened to quit, then she said he'd never, ever get his body back and be stuck penniless and without a job in her body. He felt stuck, so for the time being, he just decided to take it.