Any recommendations for a yaoi manga with dirty talk during sex? Preferably uncensored ...

Following!

http://www.mangago.zone/tag/dirty+talk/

I already read those tagged under 'dirty talk', but that doesn't mean there isn't more (yet untagged) stuff ^-^

http://www.mangago.zone/home/mangatopic/1063687/

Well then, If you want really kinky stuff then I would recommend "F/studio" http://baramangaonline.com/eng-penguin-frontier-fstudio-%E3%82%A8%E3%83%95%E3%83%BB%E3%82%B9%E3%82%BF%E3%82%B8%E3%82%AA/
There's no interesting plot, it's basically just fap material ╮(￣▽￣)╭