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unprotected sex

Attracted to men and women? Our sexual orientation can undergo ‘extensive’ changes as we age, and more so in women, study says

The vocabulary we currently use to describe sexual orientation is hopelessly inadequate, with labels like 'gay', 'straight' and 'bi' falling ...

Is gender identity fluid or fixed? What we know about other animals might help inform the debate.

Distinguishing between sex and gender is a vital first step in understanding gender identity ...