Handedness and sexual orientation
A relationship between handedness and sexual orientation has been suggested by a number of researchers, who report that heterosexual individuals are somewhat more likely to be right-handed than are homosexual individuals within both sexes. The psychologist Chris McManus and a team of researchers weighed in on the relationship to homosexuality and concluded: Many studies in the 1980s and 1990s had asked whether there was any relationship with handedness, and we, like others, had concluded that there was not.
Source: Wikipedia — Handedness and sexual orientation (CC BY-SA 4.0)