That is very interesting, DonInKansas. When I am angry I usually exlaim, "Darn it." When I used to get upset with someone, like my children, I used to use the very soft British swear word, Nimcompoop" to describe them. (I do not know how to spell that, sorry) It is like  saying, " mind your own bees wax" as opposed to " mind your own business," which is softer on the ears. Every language contains some choice swear words, I am sure. The St. Francis story does not surprise me. In Medieval times poverty, ignorance and misery was so widespread that vulgarities prospered, apparently even in religious sermons. I have lived all my life without needing them.