How many of Du watch hentai and why

I've only seem it like once oder twice trying to see what it is (like I did 5 mins Vor trying to find out what hentai tentacles was, and now I regret it) but I guess Du can say people watch it for the same reason people watch Yaoi and yurI.
In my case I watch/read Yaoi well I think it's the cutest/hottest thing ever. I usually watch the good ones for the story line not the sex but that's kinda hard to find so I don't watch it has often.
That probably doesn't answer your Frage 100% but I'm sure everyone has their own reason. Most people watch it because they find it attractive.

Some Hentai have a nice plot. Besides Du can always watch them without the explicit scenes.