"You know all dairy causes breast cancer don't you?"
Don't tell my mother... I've been feeding it to her for almost six years now, and she is STILL healthy - with no signs of cancer. What dosage of dairy do you recommend to actually cause cancer?
.....
In all reality though - your response - or lack thereof - was probably the best. The woman may have been - in her own awkward way - been trying to start a conversation.
Regards,
Jim TX