For a manhwa where the uke can't sense pain and taste food but he can is able to smell the seme. The seme doesn't know this at first so when he learns they break up for gor a while..
The uke has black hair and moles and the use has blond hair
Sounds like this one https://www.mangago.zone/read-manga/six_sense/
Reading this is like eating eating food with no seasoning. I don't prefer it but still keep eating