Beyond Mars & Venus by John Gray.
Not finished it yet.
In the immortal phrasing of a regular here;
hihi - That sounds like a compilation of "Men are from Mars & Women are from Venus" that crashed into "Fifty Shades of Grey".
It's the updated version of "Man are from Mars & Women from Venus" as people and society have changed.
Nothing 50 shades-like in it. I've written a couple of those myself :)