More blue balls on July?

[crazyforsex]

I was using Google Trends (which shows the volume of searches on Google for given terms) on random topics, and tried "blue balls". I was quite curious about the graphic pattern: from 2004 to 2008, it had a more or less regular level, but reaches a peak around July each year.
Can you explain this?

[choice]

I don't know if this is why, but there is a Blue Ball music festival in July...
http://www.last.fm/event/1020966

[crazyforsex]

Oh, that explains. I imagined it would be something completely unrelated to TD