"I've been trying to figure out what might be making your pheromones go out of wack, by comparing you to the others," said House. "But I haven't been able to yet." He sat in the chair across from him. "The other thing is, I have a theory about why you're getting sick. I've been able to isolate the type of energy that it seems you absorb through ah, intimacy. I need to do some measurements, figure out how much you can get from individuals and how much you need."