Study: Last News

Journal of Sex Research last week affirmed the longstanding theories of a “fraternal birth order effect,” in which “men’s propensity for homosexuality increases with the number of older biological brothers they have,” the researchers noted in an article for The Conversation.The scientists — Christine Ablaza, Francisco Perales, and Jan Kabatek — noted that past research into fraternal birth order effect had involved small samples. To counter this, researchers used Dutch population registers and followed the lives of nine million people born between 1940 and 1990.While the registers don’t explicitly state sexual orientation, researchers used same-sex partnerships and same-sex marriages to determine an individual’s sexuality.They argue that, despite excluding all gay people who haven’t registered an official partnership or marriage, their findings demonstrate “clear evidence” of fraternal birth order effect on homosexuality.Dutch men with three older brothers are 41% more likely to be in a same-sex relationship than men with three older sisters.They are also 80% more likely to be in a same-sex relationship than men with three younger brothers, which researchers say show that being the youngest sibling increases the likelihood of homosexuality — and that the differences increase with the number of older male siblings.However, even one older brother can make a difference.

study published in the Social Science Research Network found that job applicants who use “they/them” pronouns are less likely to be hired.The study’s author, University of Toronto Ph.D. candidate Taryn Eames, claims the study is “the first large-scale correspondence study focused on evaluating hiring discrimination based on pronoun disclosure.”Eames sent out 7,970 pairs of fake resumes — one with “they/them” pronouns and another without — for a fictitious applicant to large corporations and small businesses in six U.S.

report, released last month, provides an estimate of the number and percent of the U.S. LGBTQ adult population, based on data from the Behavioral Risk Factor Surveillance System, a network of health-related telephone surveys that inquire about Americans’ health-related risk behaviors, chronic health conditions, and use of preventive services.Based on the BRFSS data, the Williams Institute estimates that approximately 5.6% of the U.S.

Plos One medical journal — gay and bisexual men over 70 were more likely than their straight peers of the same age to have had more than one sexual partner recently.Those men were likely to continue having sex with multiple partners, while straight men and women became less sexually active.Women who have sex with women, and other relationship types, were discounted due to small sample sizes.The study, conducted by researchers at the University of East Anglia, King’s College London, and University College London surveyed more than 5,000 adults during the 2022 mpox outbreak, looking at how sexual activity changes with age, in order to develop scientific models for sexually transmitted infections, reports Sky News. Researchers surveyed 5,126 British adults from September to October 2022 — including 3,297 from the general population, 1,036 men who have sex with men recruited from Facebook and Instagram, and 831 people responding to adverts on the gay dating app Grindr.“Before this study, many models about sexually transmitted diseases assumed that everyone over a certain age, say 40 or 65, stopped being sexually active, or at least stopped having multiple partners.