Let me get this straight: you are dating a woman who expressed interest in something that also interests you. She engaged in a conversation about it, and that turned you off?
Or, were you unsure that it turned you of and you are seeking advice here, from the supportive, wise constituency of Lets Run Nation?
Or, you know that it didn't turn you off, but you are worried that you might have to show some humility and acknowledge that a woman with a brain is capable of conversing about a wide range of topics, including one that you feel is your domain. This is threatening to your fragile masculinity, so you came to Letsrun.com to share this experience, with hopes that an array of misogynistic responses would boost your ego.
Or, the above, except that you didn't actually go on a date with this woman, but still thirst for the misogynistic ego stroking that Lets Run offers with such comforting consistency.