well there is a certain choice u need to make before u can kiss dean on day 6. it is one of the first choices u get in dean's route.
False. The conditions on that option are affection plus having done something in a previous scene.
Also False. I literally tried all the diff. choices and only one changed it
I don't think you're in a position to really argue against someone with the source code and that wrote those scenes. :P
