Recommendation

I really like
Yatamomo
and
Akiyama-kun
scenes

hmmm there's tonnes of hot sex scenes in yaoi mangas~ Too many of them! You can try with;

Katekyo
Hidoku Shinaide
Elektel Delusion
Kashikomarimashita Destiny
Finder
Kobi No Kyoujin
Koisuru Boukun

(These are just some that i can remember!)

Depends on you personal kink, dear. For me Zaria & Yamada Yugi are the goddesses of BL sex scene! Here's something to help you choose from - http://www.mangago.me/home/mangalist/26617/
http://www.mangago.me/home/mangalist/102253/

personal opinion: it can only be hardcore for me.

┑(￣Д ￣)┍
gravitation doujinshi, bi series by ike renbun and any tsukomo box mangas.