Rattlesnake Mountain is the story of a young man who goes out to mow his field and is bitten by a rattlesnake. His gal tries to save him by sucking the poison blood out of his wound, but she has a rotten tooth and they bot die. The final verse gives the moral (advice):

Now all young lee-wye-lovers a warning tee-wye-take
From Sally bee-wye-Bland and Johnny bee-wye-Blake,
And mind when you're in lee-wye-love don't pee-wye-pass
Too close to pee-wye-patches of high gee-wye-grass,
To my roo-dye, roo-dye, roo.

I have always tried to live my life by that advice.