Someone pointed out to me that men are more attracted to the female figure while women are more attracted to the act of sex itself. That's why monster girls and such are more common than monster boys, and why tentacles, regular male animals, goblins, orcs, etc. are so common in hentai for female viewers. They don't care about the characterization of the male, they just care about the male rutting the female lead.

This is in contrast to hentai and doujins for male viewers where the female monster/breast have characterization and talk in full sentences. Men want personality and human like interaction, women want animalistic fucking. I think it also applies to futa as well. Futa porn made for a male audience is usually focused around characterization while futa porn for a female audience (which is most of western futa) doesn’t really explore the characters all that much and instead get straight to the fucking.