I’ve got a neighbor who does hiring and background checks for the local police department. He says as part of the process he has applicants answer a generic 100 question personal history questionnaire that he found on the internet. He said when he first went through it, he was somewhat taken aback by the weirdness of some of the questions, but...
He said that as a result of some of the answers flagged on that test and follow up questions, several applicants have admitted to having sexual relationships with A) their pets, and/or B) their biological siblings. He said it’s totaled about a half dozen out of the couple hundred applications he’s processed over the years, both male and female.
He theorized that it was something about the alleged scientific appearance of the test and the formal nature of the interview led people to open up about things they otherwise would not have, either directly or by answering related questions in an “odd” manner that were flagged and later pursued.
The crazy thing is, he said there was nothing formal or scientific about the questionnaire at all. It was literally something random he found on a google search.