Responses
In this webtoon, sex is not about making love (let's put aside the seme's past wherein he plays around, has a lot of partners which he decides to dump in the recent chapters as he develops feelings for dong-gu the uke).
It's treated as an injection for an unknown virus that infects males (since the nurse, yeon-jun drank the cure by accident, it is theorized that his body fluids can be used as remedy, the semen particularly the most effective, and should be injected to the infected patient obviously through intercourse)
Why the hell does the seme fuck everyone he sees??!! (︶︿︶)＝凸 (︶︿︶)＝凸