How not to hyphenate the last word of a paragraph

Question

The LaTeX hyphenation is very good. However, how to not apply any hyphen to the last word of every paragraph? Of course, one can use the \mbox{last word} combination, but this is too complicated.

Answer 1

(revised answer after receiving comments by Enrico and Gustavo)

Both Plain-TeX and LaTeX provide the following default setting:

\finalhyphendemerits=5000

This parameter comes into play if the second-to-last line of a paragraph ends with a discretionary hyphen. Changing this setting to \finalhyphendemerits=200000, say, seriously increases the penalty associated with a discretionary at the end of the second-to-last line of a paragraph -- making it (much) less likely that such a discretionary will occur.

However, if the final word of the paragraph happens to be something like "supercalifragilisticexpialidocious", TeX may still insert a discretionary hyphen in that word even if \finalhyphendemerits=1000000 is in effect, since failing to hyphenate the word could make the paragraph look (even) worse.

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Here's an MWE. Observe that the first paragraph, which allows hyphenation of the final instance of "supercalifragilisticexpialidocious" even though \finalhyphendemerits=1000000 is in force, looks a whole lot better than the second paragraph, in which the final word cannot be hyphenated because of the presence of the \mbox wrapper.

\documentclass[draft]{article} % insert a "slug" at overfull lines
\newcommand\super{supercalifragilisticexpialidocious }
\begin{document}
\finalhyphendemerits=1000000
\noindent
\super\super\super

\noindent
\super\super\mbox{\super}
\end{document}