just watch human porno... that would seem like the logical thing... Why do cartoons when you could see real people... on another note, watching Hentai, Porno, Soft Core, Hardcore, whatever makes your jollies roll is a thing left up to the couple in question.
Better question to ask is, "Why do we need it?" If you cant rock, then dont pick up the instruments.
i'd be pissed off, i haven't seen anything along those lines for 5 years cuz of her. and she's the type to wait till marriage and all that. so im screwed until then. but yea, i think it would be funny, i would be making fun of her the whole time. i'd watch, but not actually watching the hentai. i'd be messing with her the whole time if anything. but yea before that i would be in a heart attack. its because you know someone well enough that it suprises you really bad when they do the totally unnespected.
I'm male so I'd be amped. Hentai is usually super extreme. If my girl wants to watch super extreme porn with me, that can only lead to fun and experimental things in the bedroom. At worst, it could lead to standard sex so it's still a win.
... as long as it isn't hardcore extreme yaoi hentai.