One of the best, if not the best, writing of all HTML games I've tried so far. Maybe CRACK comes close second, mainly due to the graphical explanations, but comes nowhere near as close as good variations of partners like here.
Overall, I say ths game needs some visuals, and would easily trip "The Company" or other lazily written games around.
Edit: just saw the quote above that it would be difficult getting art with the same actors for all variations.
My suggestion would be to try cropping/altering the pics, so they do not feature any facials. If the art is primarily focused on the fucking, especially if its well chosen and SUFFICIENT (not lazy 2-3 pics per scene like most HTML games), even if its not gifs or animations, it would still rock.
Layout I'd chose for displaying the pics would be a to divide the text iframe into 2 columns and pics go on one side, text on the other. If sides switch, it makes it even more graphically interesting.
If I had the time I'd make it, unfortunately I am a lazy, ugly consumer of the i-net and not a contributor, for over 10y.