My dad made a comment today about "those sick s&m people." It's the first time he's ever said anything disparaging about BDSM, and honestly, while I assumed he didn't want to know the details of my sex life, I always assumed he respected people's rights to different lifestyles. He's generally very open and understanding. I almost defended "those sick s&m" people, but then I didn't. I don't want to give away the details of my relationship, because I know he doesn't want to hear it. At the same time, I don't want to let the comment slide, because he's a psychologist, and his opinion on this will have an effect on his clients.

Has anyone had a similar experience? Any advice on what I should say or do?

Thanks!