Sentence:  Now, what is interesting about that poem is nothing. But, what is relevant about it is that his muse is his wife, Marcela, who is 42 years younger than him. He is 75, she is 33. And I'll say this, at least when 70-something American politicians get creepily handsy with 30-something women, they have the <WSD>decency</WSD> to do so with their own daughters. Have some class, Brazil! Have some class! 
Meaning of the word marked with <WSD> tags:  The quality of being decent; propriety.