The Angels were all male. All except for Lailah. This wasn't by design because God didn't assign genders to the Angels, but the Son was the Son, and, maybe, they all just defaulted to that upon being called into existence. Except for Lailah. Haniel was no exception, but, later, Haniel was fascinated by Lailah and that she was, well, a she. Not that Haniel ever spoke about that since Lailah was never really accepted. Once humans arrived on the scene, though, Haniel could no longer resist his fascination with female-ness. He never turned back. We know her better today as Aphrodite or Venus, but they are just aspects of Hanial, the Angel of Pleasure.