As an avid reader at myreadingmanga, this isn’t my entire dirty collection. This is only the list of ones I (atm) remember I enjoyed either because of the sex or the storyline or maybe both. We all know yaoi got some pretty twisted shit so there will be disturbing ones mixed into the pile.
Webtoon List:
http://www.mangago.me/home/mangalist/428386/PS: Istg I think I need to make a No Morals Yaoi Collection, because some of the hottest sex just has the shittiest plot.
Taiyou to Himitsu (Secret and Sun)