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Sexual Orientation & Identity

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Sexual Orientation & Identity
Manuel (Matthew) Custodio
The Brain, The Body and The Mind: All Together Now (Psy/240)
10/21/11
Instructor: Tana Warren

Sexual Orientation & Identity
There are many different perspectives relating to a person sexual orientation and identity, which will be examine.
When examining sexual orientation there are three different types, which are heterosexual (attraction to the opposite sex), homosexual (attraction to same sex) and bisexual (attraction to both sexes) (Pinel, 2009).
One perspective is orientation is link with genetics; finding that twin brothers with similar DNA were 52% of monozygotic twin brothers and 22% of the dizygotic twin brothers were homosexual (Pinel, 2009). Women had similar results with 48% for monozygotic twins and 16% for dizygotic twins female were homosexual (Pinel, 2009). However, no gene has been found to confirm or deny the claim that sexual orientation is genetic (Pinel, 2009).
Another perspective is that perinatal hormones has an effect on sexual orientation in humans (Pinel, 2009). The support for this comes from the quasiexperimental study of Ehrhardt and in this study they interviewed adult women that was exposed to estrogen during pregnancy (Pinel, 2009). These women children that were exposed to the estrogen were more likely to be attracted to women (Pinel, 2009).
Last, perspective is that sexual orientation is a matter of choice is consider to be a false assumption; people discover not choose their sexual preference (Pinel, 2009). Moreover, sexual preference develop at an early age (Pinel, 2009). This is according to the book and I am not in complete agreement with these findings because I have known ex-homosexual make a choice to be heterosexual and many of these individuals are happily married.
The different perspectives are genetics, hormones or choice is what determines a person sexual orientation and identity.

Works Cited
Pinel, J. P. J. (2009). Biopsychology. Boston, MA: Pearson

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