Causes: Inborn (Nature)
Is There a "Gay" Gene?
Do Studies Conducted on Homosexuality in Twins Show a Genetic Basis of Sexual Orientation?
Can Hormones Affect Sexual Orientation?
Does the Fraternal Birth Order Effect Demonstrate a Biological Basis to Sexual Orientation?
Are There Physical Differences in the Brain Structure of Heterosexual and Homosexual People?
Is There a Connection between Sexual Orientation and Handedness?
Is There a Connection between Sexual Orientation and the Ratio between Second and Fourth Finger Length?