Who's Bigger?

Since elementary school, Yeonwoo, Siwoo, and Ian, inseparable best friends, meet up after a long time for drinks at Ian's house. As Ian and Siwoo get tipsy, they suddenly start bickering about whose dick is bigger... Yeonwoo, who just wanted to drink quietly, blurts out nonsense in his drunken state. "Hey, how do you know whose dick is bigger without taking them out? I'll settle it today, so take them out, let's see." Ian and Siwoo, who have been harboring a crush on Yeonwoo since middle school, have no intention of missing this opportunity, and they take him to the bedroom and pull out their dicks first. "Yeonwoo, if you can't gauge it just by looking, why don't you hold it with your h...