Lest we become overly enraptured with the current tide of mustache popularity, we remember those times in the past and surely, those in the future, when mustaches have, and will once again, be thinned out.

Such was the case for the British as they jaunted across the globe in the 19th and 20th centuries, riding their face growth to astonishing highs and nauseating lows, as this article from London's Daily Mail (where we got the above picture) points out:
http://www.dailymail.co.uk/pages/live/articles/news/news.html?in_article_id=486942&in_page_id=1770