Found below online but can't find reference so no 100% sure it isn't fluff... but it is interesting:
A new study from the "Stockholm Center of Neurology" suggests that escorts' minds function differently at a neurological level. The study was conducted over the course of two years and involved the participation of more than fifty active escorts and an equal number of individuals not involved in the sex industry. Twice a month subjects were given a combination PET/CT scan as well as non-invasive psychological evaluations.
The findings were not altogether shocking. Among the control group less than 5% of the subjects were diagnosed at any given time to be experiencing stress levels viewed to be dangerous to the subject. The Psychological exams were unanimous in finding the control subjects to be within reasonable boundaries for a functioning member of society. Although the 4% mentioned earlier would have been strongly suggested to return for further counseling, the evaluators at no point felt that it would be mandatory as they posed no threat to themselves or others.
What one wouldn't expect is that the group comprised of escorts had a higher yet similar number of flagged evaluations, 6.3%. This group was also cleared after each test as neither a threat to themselves or others. These findings would suggest that working as an escort poses little to no undue threat to the mental health of an individual. That is, until the PET/CT scans are taken into account.
Scientists were shocked to find that the group of escorts had a level of brain activity 79% higher in the limbic system. The control group showed minor increases during times of stress such as moving, a breakup, death of a family member. However the escorts showed extreme activity in the limbic system at all times of year and no matter that personal situations were at hand. The limbic system deals with the body's stress, emotions, and memory.
With such a bizarre discrepancy the lead researcher, Giles Mcarmouth, had this to say. "We were more than a little surprised to see such a large difference in the limbic activity levels. Or course we suspected a life in an industry such as escort work would lead to elevated stress. The strange part is not the stress itself, but the individuals' ability to compartmentalize the stress. The psychological testing shows no noticeable difference in stress. The only reasonable explanation is that escorts are in fact aliens."