Fuck Exhentai, half of their shit is wrongly tagged. Why isn't there a tag for cunnilingus? Shit, I thought forced cunnilingus would be quite common, and you know what? It's not, it's fucking not. When I find this shit I usually lost all interest in fapping.
What about yuri? 1/4 of the doujins aren't even yuri, but futa or threesome.
Non-h is such a clusterfuck. I love erotic Touhou doujins, but of course almost only sappy shit is tagged as yuri for some reason.
For me fapping sessions equal frustration.