Embarrassingly, I listened to a youtube video where a woman read the book aloud (I listened for about 30 pages). She ended up hitting herself in the head about a dozen times because the writing is that awful.
The reason that 50 Shades of Grey is subjected to highbrow literary scrutiny, is that it pretends to be highbrow literature. Male pornography usually makes no pretense, being more along the lines of logjammin' "ich bin here to fix your kable"
That's the patriarchy angle, if you actually want it.
Male porn is just porn, but "50 shades of gray" is presented as it is a regular book...