It's worth clarifying that one partner must be HIV positive for transmission to occur. Getting tested, knowing your status, and then having an honest conversation with your partner about your sexual histories can lessen the fear factor before any rendez-vous. Whether you just met or have been doing it for ages, you'll both benefit from knowing your status.
Gabriel Theophanous has needed a blood transfusion every month for 30 years because he has the condition thalassaemia. He said: "I just want to know the blood is safe - this issue doesn't cause me any concern."