Which foot when braking with auto?

[cyberstang5.0]

well.... according to my drver's ed class (a long time ago) I had to learn on an auto. They told me to use only one foot, the right one. Well, ever since I tought myself how to drive a standard, yes, I tought myself.... when I am in an auto I use two feet now. I am so use to using my left foot for the clutch when I drive a standard, I feel like it has to do something. I don't think it really matters as long as you stop, right? Also, if you do decide to use two feet when driving an auto, make sure that you don't accidently "ride" the brake.