Best not mention it to my wife, but there's a few things my ex-girlfriend has done which are, even 11 years later, fodder for the occasional wank. I'm not sure I ever told anyone else about this particular instance.
Anyone who has been in a long-term relationship probably knows what I mean when I refer to a routine fuck. No special occasion, just a moment in time we wanted to pass in the manner best suited to our natures. This was one of those routine simple fucks which quietly maintain the bonds.