What if they were both werewolves?
Choi: You don't know how sexy you look.
Lee: Oh trust me, I know
Choi: Who said you looked sexy in the first place?
Choi: You know, it's so much easier being with you.
Lee: how so?
Choi: Well Ji never really understood the monster. You are the same as me though.
Lee: you're right. I bet my monster's bigger though.
Choi: No way. Mine's bigger and you proved it right last night.
Lee: Oh yeah? Tell me what I said.
Choi: You said in that sexy moany way that I feel so big and too good.
Lee: well you haven't tried helping my monster.
Choi: don't even go there