Skip navigation! Story from Living. Could twins hold the answer to the much-debated question of where human sexuality comes from? Scientists think they might provide a clue.
Gay & Straight Twins Are Being Studied To Work Out Where Sexuality Comes From
Lesbian and straight twins may provide secret to understanding human sexuality | The Independent
The researchers hope that the study may help them work out how, when and why human sexuality is produced. Scientists are studying identical twin sisters - one of whom is heterosexual, the other is homosexual - to try and gain a better understanding of human sexuality. Sarah is straight, Rosie is a lesbian and the twins are now being studied by scientists at The University of Essex. So they went back to Sarah. This is certainly the case with Rosie and Sarah - their childhood pictures reveal the twins as toddlers, with Sarah wearing a dress while playing with a Barbie and Rosie in a Batman outfit playing with Aladdin. The researchers concluded that from around the age of six in girls and eight in boys, sexuality differences were visible. But the work has been controversial, with some people criticising the researchers for reinforcing gender stereotypes.
Your Good Health: Why is one ‘identical’ twin gay, the other straight?
Most of us believe that we were born that way, but is sexual orientation in our DNA? JV Chamary goes in search of the gay gene. By Jv Chamary. Volunteers from over families responded.
Incest between twins or twincest is a subclass of sibling incest and includes both heterosexual and homosexual relationships. Sexual arousal from a twin sister or sister in general is referred to as sororilagnia or sorophilia , while a male analogous term is fratrilagnia ,  and the more general term is sibcest. In traditional Balinese culture, it was [ when?