
The sex part is random, but when Kim dam realized it was all about sex and money. Now he's using it as a tool and basically saying we'll do it one more time, but after that you're leaving for good. Let's be fr too, Kim Dan has mental problems such as low-esteem and he's at a point where he doesn't even have self-respect from himself so he's gonna give his body up for Jaek that easily since that's what it has been from the start.