If you think about it Kihoon has gone through shit so downright horrible. Had his bones broken, stabbed, torn open and closed, etc that the burn and the pain of being torn open feels mild or just a tingle for him probably lol that's why he can smile and kiss Yeon and force himself to take him. But is that even comfortable for both.. who knows. I just know anyone else's dick would have snapped in half. Yeon is another level he's special.
If you think about it Kihoon has gone through shit so downright horrible. Had his bones broken, stabbed, torn open and closed, etc that the burn and the pain of being torn open feels mild or just a tingle for him probably lol that's why he can smile and kiss Yeon and force himself to take him. But is that even comfortable for both.. who knows. I just know anyone else's dick would have snapped in half. Yeon is another level he's special.