"My Sadistic Master" maybe
https://www.mangago.me/read-manga/midnight_rain_ctk/
https://www.mangago.me/read-manga/on_doorstep/
https://www.mangago.me/read-manga/loplop/
ctk is your artist/mangaka, my friend
A Sense For Love it's quite hairy but not really old
Sajou Rihito no Chichi to Sono Buka - old man, but sadly with younger subordinate
Michikusa (Saika Kunieda) - old man yaoi but nothing disgusting, short with very funny twist, without smut
Monster and the Beast - this one is so good
And this one Can I Hold Your Hand? (Yaoi)
A Song of Blood and Fire (Yaoi)
Lovers on the Last Train is amazing!!!
I got a list for that dear! (≧∀≦) Here you go happy reading!
https://www.mangago.me/home/mangalist/2543440/
anyone got recs for yaoi with middle aged men? like 30s-50s or just any with facial hair is also ok