Correct response, "I'm a man, why would I be pregnant?" Instead, he refused to answer the question and got belligerent, getting him kicked out. If they give you trouble for asking a question back to them, very calmly say, "I am a human male. I have one x and one y chromosome. In your medical professional opinion, do you think it is possible that I am pregnant?" If they refuse to engage honestly with that, tell them to mark you down as pregnant and that you demand they start worshipping you as the second Holy Mother because a miracle has just happened.