Personally, I wouldn't allow another to interfere with my capacity to defend myself in a lethal situation.
But there have been times when this subject has been brought up by women (family, friends, and those that I was dating).
I repeated the following quote:
"All that is necessary for the triumph of evil, is that good men do nothing." - Edmund Burke
They know that there are evil men in the world and that I'm a good man. I carry to protect myself and those I love. To not do so when I had the opportunity would be a gross failure on my part.
They know the reasoning behind my actions. And that the decision to carry is not negotiable.