I think he slept with someone before knowing dong gun..
Both the doctor and nurse are manwhores* they've been sleeping with countless other people even before knowing the MC dong gun.. Thy think with their d*cks and I just want to say DONG GUN OR WHATEVER HIS NAME IS THAT HE DESERVES A MAN WHOSE LOYAL AND NEVER TURN HIS BACK ON HIM doc have conscience but pink haired guy on the other hand have the audacity to go to ukes house after f*cking a thousand asses.. I hate semes like that (╬ ̄皿 ̄)凸
Well, a doctor is for our little dummy way better than that pink haired asshole