In Outing The TRUTH About Sexual Orientation I show why the sense of being male or female is not an either/or scenario, but instead occurs on a spectrum influenced by the separate dimensions of masculinity and femininity. For the most part, the sense of being male or female aligns with biological sex, due to a male hormone wash of the fetal brain guiding brain development in a male direction, and the absence of this event resulting in female brain development. For example, young boys in a playground are almost always more aggressive engaging in rough and tumble play, to the astonishment of many parents not believing in biological influences. However, this process does not always work perfectly, and the range of masculine and feminine traits a person has can influence their sense of being male or female. As transgender relates to sexual orientation, I suggest using gender identity as an anchor for homoerotic and heteroerotic behavior. For instance, a female gender identity and sexual fantasy or behavior focused on females equates with homoerotic, while sexual fantasy or behavior focused on males is heteroerotic. In the case of an individual feeling they are both gender identities, the term bi-erotic might apply.