Sexual orientation refers to an individual's preference for emotional-sexual relationships with members of the opposite sex (heterosexuality), the same sex (homosexuality), or both (bisexuality).
Heterosexuality is the attraction of an individual towards the person of opposite gender. It is the most prevalent type of sexual orientation worldwide. Homosexuality is the attraction of an individual towards the person of same gender. This form of orientation can also be commonly seen in the recent times. Both the forms have no specific reasons why people of each category prefer it.
Heterosexuality is socially acceptable. Homosexuality is seen as a taboo in various regions of the world, however various nations have legalized it.
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