Maybe something about an abandoned uke as a child, and the seme finds him?
Arigato! (●'◡'●)ノ
You may also try these
http://www.mangago.me/read-manga/sute_neko_no_ie/
http://www.mangago.me/read-manga/ohana_to_chocolate/ (not exactly abandoned, but picked up by the seme)
Any yaoi manga where the Uke or Seme is a prostitute?
Thanks!
Check out my list (from no. 42)
http://www.mangago.me/home/mangalist/59465/?filter=&page=5
Which yaoi was this again... I keep forgetting!
http://www.mangago.me/read-manga/koakuma_no_sanctuary/tr/78904/page/3/
Ass fetish yaoi manga?
Arigato! (づ ̄ ³ ̄)づ
This one might be an ass fetish not sure bc it's only the first chapter out http://www.mangago.me/read-manga/shiri_fechi_nanka_ni_sukarete_tamaru_ka/
Any yaoi manga (could be short or long, but preferably short) that's super funny?
Arigato! ╮( ̄▽ ̄)╭
Here some really bizarre, weird, and funny yaoi. Many of these are one-shots. Hopefully you find the list itself just as amusing: http://www.mangago.me/home/mangalist/92534/
Comedy / ROTFL
http://www.mangago.me/home/mangalist/13697/
I compile the funniest, hilarious mangas i've read so i can definately recommend them all, especially those i rated 3 and up. Check the romantic comedies too, they are fun with the dokidoki feels http://www.mangago.me/home/mangalist/45472/
Any Kuroshitsuji (Black butler) Doujinshi apart from the ones already in Mangago?
Thanks!!! (づ ̄ ³ ̄)づ
Go to myreadingmanga dot info and search category black buttler dj