Hadn’t quite heard that one, but there is one study that was done of planned children from lesbian households (conceived via sperm donors) that showed that adult children from such families were somewhat less likely to identify as straight than average.
Quote: For this latest report, 76 children of lesbian parents, now all adults in their mid-20s, were asked about their sexual attraction, identification and behavior. For comparison, researchers demographically matched these offspring with 25-year-old participants in the National Survey of Family Growth (NSFG).
Of the 76 children of lesbian parents, 70 percent of females and 90 percent of males identified as “heterosexual or straight,” compared to 88 percent of females and 98 percent of males in the demographically matched NSFG group.
Further, 54 percent of women and 33 percent of men with lesbian parents reported having a same-sex sexual experience between the ages of 17 and 25, compared to 38 percent of women and 9 percent of men in the NSFG group.