Do you have data to support this?
Who is the romance book reader? (source: Nielsen Books & Consumer Tracker)
Who is the porn watcher? (source: Pornhub's 2016 Year in Review ? Pornhub Insights
So if you ask which gender would prefer to only read about sex without any pictures that would be female. Meanwhile men statistically would rather watch sex and not really read about it.
What requires more imagination? Watching someone have sex or only being able to read about it? Obviously only being able to read about something would require much more imagination.
Now here are the questions that get interesting, but I have not seen data on this yet. How many men require some type of porn in able to be able to masturbate to an orgasm? Then the question for females would be how many females require a romance novel in order to masturbate to an orgasm? I would hypothesize that there is a much higher occurrence rate of men that require porn than compared to females that require books, simply because one gender does not exercise their imaginations sexually as much as compared to the other.
When I was young and before internet porn, I used my imagination all the time! After porn, I found myself unable to imagine anything sexual what so ever and would be desperate for porn. When I stopped porn and started reading, I found my own imagination to become exponentially more powerful than porn. Today I find myself unable to masturbate to porn because it distracts my imagination, so I'll turn it off and find the experience to be way better without it. I do not know how many other men have experienced that, but that it my story.
I also did a fantasy poll here on TAM, and it got deleted for good reasons. It regarded which genders chose to fantasize someone other than a spouse. Almost all men would fantasize about their own wives, probably because they lack the imagination skills to imagine sex with other partners. Meanwhile women enjoyed fantasizing about almost anything they wanted, probably because they have a superior imagination that has not been impaired by years upon years of their brains being spoon fed sexual imagery produced by the porn industry.
Of course I could be wrong! So feel free to debate if you have data or experiences that suggest otherwise.
I have also heard a great number of women describe what it is like to have had a wide variety of sexual partners and how this impacts fantasy while being with a spouse. They would describe it as having gotten to drive all sorts of race cars, many of which could really perform beyond expectations. In contrast their husbands would be like driving the family van, most often a little more bulky and not so powerful. These women also found that being limited to driving a family van could be really fun if they closed their eyes and imagined themselves back in the seat of a finely tuned race car, even if that finely tuned race car was their same husband but just twenty years younger when he was in way better shape and won awards on the college swim team.