>it just makes me recoil when they're associated with the innocence of a child.
Why is that?
Might it be that your idea of the "innocence of a child" is inflated or unrealistic?
Why do you suppose that you recoil while others laugh at the incongruity? Why do you feel compelled to judge them for that reaction? Why do you think encouraging that reaction is obviously "wrong" (especially given what you've just said about the nature of words)?