Personally I think that ass-related things should never be a surprise, but rather carefully planned for, researched, and outlined using PowerPoint and an Excel spreadsheet, but your mileage may vary.
"Mimi Smartypants," Feb. 8, 2005
This marital advice springs to mind when I open this fortune cookie ...
It may be well to consult others before taking unusual action.
... and, because deep down I am still 14, I append it with the usual "in bed."