This is the kind of stupid crap that the NIH funds for study. To the tune of hundreds of thousands of dollars.
Well, maybe it was worth the money (I'll explain why in a moment). But first, his study probably cost about $2000, maybe $20,000 tops if the researcher got summer salary for data collection and analysis and paid some grad students to help collect the data in person, not the hundreds of thousands of dollars. (My wife is in the behavioral sciences and does some survey research, so I have a good idea of the costs involved.)
Why was it worthwhile? Because the secular left values emotion and values controlled studies. "Proof" of what whe conservatives knew intutitively was true about the 'sexual revolution', from a goverment funded study that shows the Helen Gurley Brown attitude doesn't fly, and buying into it causes emotional harm to girls, can be cited in arguments for chastity. The left can't very well shout down this argument by claiming it's an imposition of religious values, or 'anti-woman', or comes from a biased right-wing source. (There is some particularly delicous irony about a study which supports chastity coming out of one of the most loney left universities in the country.)