Entering the MRT (Phone Entry)

Why is that everyone that enters the train starts to slow down even if in front is empty?... Is it because (a) Invisible Women is in front? (b)the draft from the wind of the train is too strong? (c) Too see if there is sit even if you know almost 100% that there isn't going to be go peak timing?..... Well sadly I think its NON OF THE ABOVE!!!!!. Its true..... Its just everyone too stupid or lazy.... stupid to think or lazy to move in..... Go Figure That!!!!.