Although good literary fiction is enjoyed by all, there are some genres that lean toward one gender or another. These differences seem to reinforce stereotypes.
Although not in any way universal, men often lean toward war and detective stories, science fiction and sports and women are more likely (way more likely) to enjoy romance, art, drama and self help manuals.
So, if a man really enjoys romance novels, he will likely only be able to discuss it with his women friends. Which – by the way – might be a considered ploy to differentiate and find love.