A press release sent to The Huffington Post by San Diego State University reveals that Jean Twenge, professor of psychology at SDSU, and colleagues Ryne Sherman of Florida Atlantic University and Brooke Wells of Widener University, found that "between 1990 and 2014, the percentage of men who reported having had sex with at least one man increased from 4.5 percent to 8.2 percent, and the number of women reporting having had sex with at least one woman increased from 3.6 percent to 8.7 percent." The study was conducted by combing through the General Social Survey, which is a nationally representative survey that includes over 30,000 adults who've agreed to discuss their thoughts about a variety of topics including same-sex behavior, which the survey began recording in 1978, and sexual partners, which the survey has been documenting since 1989. Twenge, Sherman and Wells found that "between 1973 and 1990, the percentage of adults who believed 'sexual relations between two adults of the same sex [was] not wrong at all' hardly budged, rising from 11 percent to 13 percent." But in 2014, 49 percent of those surveyed said they had no problems with same-sex relations, and 63 percent of 18- and 19-year-olds felt that way.  It appears giving queer sex a whirl is becoming more popular -- or at the very least, more people are now willing to admit they've had a same-sex sexual encounter. “The number of U.S. adults who had at least one same-sex partner since age 18 doubled between the early 1990s and early 2010s (from 3.6 percent to 8.7 percent for women and from 4.5 to 8.2 percent for men),” the team wrote. “Bisexual behavior (having sex with both male and female partners) increased from 3.1 to 7.7 percent, accounting for much of the rise, with little consistent change in those having sex exclusively with same-sex partners.” 
 
 A lot of the behavior appears to be experimental, the team said. “Lesbian sexual experience is highest when women are young, suggesting there is some truth to the idea that some women are ‘lesbian until graduation’ or ‘bisexual until graduation,’ at least among younger generations such as Millennials,” said Florida Atlantic’s Ryne Sherman, an assistant professor of psychology who worked on the study. “This pattern does not appear for gay (male) sexual experiences.” 
 
 The surveys suggest attitudes are changing most quickly in the South and Midwest and among whites.
– The 2010s, baby. More Americans are opening up to the idea of same-sex experiences—and trying them out, according to a survey of 30,000 adults that's been ongoing since 1972. A year after the survey began, just 11% of participants thought homosexual sex was A-OK. By 1990, that figure had barely risen to 13%. As of 2014, however, 49% said "sexual relations between two adults of the same sex" was "not wrong at all," researchers explain in Archives of Sexual Behavior, per NBC News. Young Americans aged 18 and 19 were much more accepting, with 63% agreeing with the above statement. Though there was "little consistent change in those having sex exclusively with same-sex partners," the change in sentiment is apparently encouraging more Americans to change it up between the sheets, researchers say. Those who reported having at least one same-sex partner as an adult doubled between the early 1990s and early 2010s from 3.6% to 8.7% for women and 4.5% to 8.2% for men. The jump was even larger among whites and those in the South and Midwest. The number of Americans engaging in bisexual behavior rose from 3.1% to 7.7%. "These large shifts in both attitudes and behavior occurred over just 25 years, suggesting rapid cultural change," a study author says, per the Huffington Post. "Americans now feel more free to have sexual experiences they desire." One interesting tidbit: Women—particularly millennials—were most likely to have a same-sex experience at a young age, "suggesting there is some truth to the idea that some women are 'lesbian until graduation,'" a researcher says. No such trend was seen among men. (This study found almost a third of young Americans are bisexual.)