Read this one. :D
http://www.mangago.me/read-manga/umi_chans_friends/
I dunno... http://www.mangago.me/read-manga/kichiku_megane/ ? I love that manga tho... (But then again my taste are kinda...) Other one that people kinda disgusting is this http://www.mangago.me/read-manga/akaneshinchi_hanaya_sange/ i love it bec. It has het sex as well, but it's a smutty bl manga
Try the oneshots from here -
http://www.mangago.me/home/mangalist/57857/
yeah, it's confusing for most people. but if you understand it, it's a gritty noir-ish manga that pretty dark and tragic... and hot too. btw have you tried "petshop of horrors?" it's beautifully weird too, but has pretty art and more on crime and mystery.
well i cannot gauge your read titles so i'll just shoot off the ones i like
http://www.mangago.me/read-manga/otoshimono/
http://www.mangago.me/read-manga/amato_amaro/
page 23-49 and 50-61 - http://www.mangago.me/read-manga/sore_wo_ittara_oshimai_yo/#sthash.5fT7aprn.dpuf

Manga Recommendations that are plainly disturbing, preferably one shots.... but it's okay either way! A manga that'll make you say WTF at the end :) Thank you!