>>42181834Statistically speaking: Straight men are aroused by external anatomical visual cues for sex*. Top 5, in order are chest, ass, feet, dicks and pussy. Futa, in all interpretations has a focus on 3 of them, with extras on 4 and 5.
Male on futa, 1 extra dick, futa on female, extra boobs, futa on futa, extra pussy dick and boobs. In all senses it is supposed to be more arousing.
At the end of the day, dicks are hot, we use them to have sex with lady people. Sex that you have can't not involve a dick. If all men were visually repulsed by wangers we'd not want to have sex. Dicks are hot, but we don't want to look at guys, so someone said "Why can't we have both?" and made futas.
Personally speaking, as a doujin connoisseur, i find that penises can be more expressive and visually interesting while pussy has very little variety. I probably started on futanari kyouko-chan [161954], which is almost entirely Male > Futa or Futa > Futa, it goes into Futa > Shota later on but its like, 2 scenes. Which is where my above point about expression was made apparent. Its pretty good fun, and i'd recommend it as a read if you're vanilla in all other aspects.
If we're delving into realms of futa > male or some form of mutual territory (as a sappy guy, i think a guy lovingly sucking his futa gfs dick before railing her is really fucking hot) then it comes down to, i'd say, wanted to take a submissive role.
I suppose i should also say that most of the above also applies to traps, especially sappy mutual territory [254242], though they have their own 'trappings' unique to them.
I also feel the need to mention in a weirdly heated argument i got in with a couple of fa/tg/uys. There are dudes so obsessed with proving they aren't gay that they rate the manliest hariest cuntboy as less gay than the cutest most feminine penis. Which i personally think is gay as fuck.
*
https://www.youtube.com/watch?v=p-A8GvUehq4 - TL;DW men like shemales and women like twilight.
