"The user has to interrupt her blissful reverie, open her eyes, come back visually to the yucky airplane that the beautiful music from the iPhone has been helping her escape. She then has to pick the phone up in one hand, lift it up to where she can see it, use her other hand to press the forward button, and put the phone back down. Instead of a one-hand, no eye operation, it's a two-hand, two-eye operation."

Or you can just double-click the button on the earbuds. One-hand, no eye operation.