possibly but not without cause. Men who write in that genre are seen as perverts and who can blame them when their imaginations usually have more to do with how they love to be pleasured rather then how others might benefit in return. There are some strains in Erotica, however, which are completely dominated by men but those usually are when they choose to be submissive instead of dominants.
Erotic romance is big right now and written mainly by women, only a handful are men or couples. But hardcore and literary erotica is still roughly evenly written by men and women. Hardcore leaning towards more men.