A college student explains how she landed her "sugar daddy."

From incest to sperm competition and polyamory, anatomy -- not social arrangements -- explain how a species mates

The author of "Between XX and XY" on people born neither male nor female -- and why everyone's a little bit of both

Stories that minimize incest by calling it "genetic sexual attraction" are peddling pseudoscience

Genetic sexual attraction shouldn’t be shamed. But the abuse that it causes is unacceptable

He also insisted that the Jewish community stands behind his invocations of Nazis to describe everything

The justice defends his "absurd" arguments to a gay student, and is astonished when he can't persuade him

Demand for "MILF"-related content in the adult film industry is through the glass ceiling, says GameLink survey

World's richest oil company sues FX television network in act approaching self-parody

A new study comes closer to figuring out why men die more often from viral infections

It’s time for legislation and education to reflect sex as a spectrum with unlimited options.

The comedic star takes a turn as a dramatic actress — and producer — in a raw, uncompromising tale of trauma

Clinton has lied when it suits her, but Trump's belligerent ignorance of fact is something else entirely

"It comes down to it's not the government's role or anybody else's role to make that decision"

Genetic ambiguities challenge traditional definitions of gender.