>>2
Futa is actually more heteroMale than heteroMale. Goto wikipedia and read up on why if you want academic reasons, but if you search your soul, you know this to be true anyways.
Pay attention to the camerawork in lots of porn. Pay attention to the framing of male characters in
The theory is that you, the heterosexual male viewer, want to engage in intercourse with a woman, but since you can't do that through a peice of media you use your imagination to project yourself onto a proxy.
The problem is that that proxy still has an identity and characteristics of its own, which prevents you from experiencing the fullest level of transference. And in the case of hetero males, that not only prevents empathy, it can create revulsion.
With futa you get full on penetrative sex with the complete absence of any other male competition, that's why futa works. Its the perfect missing piece to your porn puzzle.
Notice in all of these anime, the futa is always a WOMAN who gets a penis through some magical means, and not a shemale. Careful attention is always paid to that in the characters identity. These things are carefully thought out.