my friend loves sex, can you give perfect smut yaoi recommendations?

there is a category for that under the smut tag section. bro, just go search it, there's a whole section (￣∇￣")

Youjin
Window Beyond Window
Pet Keiyaku
Kuroneko Kareshi no (Series)
Coyote
Bouzu yo Kumo
Minori no Te
Yondaime Ooyamato Tatsuyuki
Gamushara Mob Rape 2 Chikan Jigoku Hen (KnB DJ)
Rakuen no Ori
Love Letter (Snk DJ)
Hito wa Sore o Shitto to Yobu (H DJ)
K- Sensei (Series/Trilogy)

and that's about all I've got off the top of my head.

Darkness Hound

just smut or smut with plot?

plenty of good ones here
http://www.mangago.me/home/mangalist/50912/
what came to my mind for first rec is haru wo detaita. it's around second page of my list for my review.

Smut w/ plot. I recommended Youjin to him first. Thank you for the lists, I don't really know how to search for lists in mangago

http://www.mangago.me/listtag/

Not only your friend, I believe. (๑•ㅂ•)و✧
http://www.mangago.me/home/mangalist/157766/
http://www.mangago.me/home/mangalist/527/
http://www.mangago.me/home/mangalist/94837/