"FIFTY SIX SECONDS is all the time a person will spend watching your loading animation, clicking through your site, reading your copy, and watching your content. A 60-second spot."This article was posted in 2009 on Annoying Design.
"women think of sex once every two weeks whereas men think of sex every 58 seconds"and as a result, in 2007 I wrote a song for Grateful We're Not Dead entitled At Least Once Every Minute.
Needless to say, it's likely the men surfing the 'Net who have had the greatest impact in generating the 56 second statistic. It then allows them 2 seconds to switch over into thinking about sex.
At least that's how I see it from Between Keyboard and Chair.