I wondered about it this morning, and decided I didn't want to be in a hospital ward or sharing a bathroom with sick people at all, regardless of gender. But I remember when I was in Carlisle hospital (my only overnight hospital stay occurred when I was backpacking when I was 20) and the women in my ward were all having a ball. They were gossiping, and saying how it was like a holiday not having to cook etc, so maybe they would have gender preferences as it was more like a holiday home than a hospital.