You've read about the index to ring finger ratio? It's supposed to predict for masculine/feminine tendencies, and be influenced by the amount of testosterone present during pregnancy.
My wife, who is extremely feminine in just about every expect, and somewhat math and tech challenged, was surprised to learn that her markedly shorter index finger indicated that she should be mathematically gifted and have lesbian tendencies.
I remember that. They’ve tried to state the size of the hypothalamus, finger length, eye color, left handedness and more are indicators for those with same-sex attraction. None of it is true, none of it holds up to the facts and no study ever has supported anybody is born with an attraction to the same sex. It’s all sensationalism.