Must admit I don't understand the idea that acknowledging the reality and its seriousness by a T is irresponsible. I think he gave you a gift: as lolagrace mentioned, you wouldn't have asked the question unless you had some feelings or thoughts or concerns about it, consciously or unconsciously. Your T being so straightforward and treating your question with the utmost seriousness and reality that it deserves communicates that the subject can be explored--that there is no taboo or stigma in its articulation. To minimize your concern--which is what most people in our lives would naturally do-- would be a great disservice to you.