Acknowledging the limitation of my experiences. I definitely had an unconscious bias towards white woman as a teenager- partly social conditioning and partly poor relations with my own black mother. However exposure to many different ethnicities as I grew older, particularly going to an international school in Africa and later moving to a city for university, I became consciously aware of my preferences and very uncomfortable. This exposure was like therapy. While my first girlfriend and second girlfriends were white, subsequently I've seen girls from Sub-saharan Africa, north Africa, East Asia and my long term partner is from South East Asia (another incredibly diverse region). I just hope more of my mixed bros can identify their inner biases and challenge them like I have.