Cross-sex friendship
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A cross-sex friendship is a platonic relationship between two non-familial people of differing sex or gender. While this kind of friendship is widespread in heterosexual culture, cross-sex friendships
Two students of different genders playing a card game
Heterosexuality
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Heterosexuality is romantic attraction, sexual attraction, or sexual behavior between people of the opposite sex or gender. As a sexual orientation, heterosexuality is "an enduring pattern of emotiona
Cross-sex friendship
…cross-sex friendship is a platonic relationship between two non-familial people of differing sex or gender. While this kind of friendship is widespread in heterosexual culture, cross-sex friendships involving mixed sexual orientations often mirror mate-selection preferences and provide opportunities for short-term…
A straight couple
Bonobos mating, Jacksonville Zoo and Gardens.
Hoverflies mating in midair flight.
An intimate heterosexual couple