Thank you for your comments, folks.
Other than the possible humorous side, what brings me back to this image over the years is a certain quirky, contrasting human symmetry throughout.
The contrasting shades of shorts (both pairs), girls body shapes, width of camera straps, the tank tops with differing V and curved collar styles, opposite shoulders to hang the camera...
And I suppose that if we were privy to what type of cameras they were, one would be a Nikon and the other a Canon...
Or...I'm simply starting to lose it and need a vacation away from looking at photos...
Tuna