How do I get an erection from hentai?

If you get turned on by Hentai it'll just happen.

If you don't, then there's a number of reasons:

• You just don't get turned on by Hentai.
  [*]You haven't found your preferred type of Hentai.
  [*]The hentai you've been watching/reading is crap quality and unimmersive because it's just so terrible.
  [*]You've read/watched so much of it that you've been desensitized to it.
  [*]You have Erectile Dysfunction.

You can't force yourself to like something.

I can't believe I'm actually explaining this.

Either you're aroused or not, can't really force yourself to get aroused if your body doesn't feel like it. Try other media or just do it another day, pretty simple.

For me its all about accumulating enough mental pictures and once its enough,then, I can rub one off.

Well... Gravity cat, Misaki_Chi and El ORLY pretty much nailed it...

The points have been well made but here is my two cents
Well, what kind of normal porn normally turns you on? Try looking for hentai similar to that.
And I know there is plenty of hentai where you don't see the male because your supposed to put yourself in the man's place.
If that doesn't work, maybe you just need to give yourself a little "jump start" ... You know, get yourself erect with your hands and then start reading or watching the hentai? I dunno but It can't hurt to try that one.
Maybe you just need to find your niche... Your fetishes... Try looking up the stranger bits of hentai on google images and see if that does anything before you try videos or full manga.

Ummm, congrats?? Though not sure why I was specifically quoted lol

Again happy for you and all, just not sure why I was specifically quoted for this news when you could've just posted a general statement for all to read lol

What a fucking dumb thread.

I can read hentai all night and never get turned on, unless i find somthing that works for me, (see Incest, monster girl, pettanko, tentacles) i just go to somthing in my favorites, which is stuff i know works for me.

IF hentai isnt working for you, try going through the tags that seem like they might work for you, or through the nosebleed forums. Still dont work? Im out of ideas.

Just play with it for a bit and it'll happen. I also recommend rubbing your nipples. Doesn't work for everybody, but when it works it works.