You should always be driving, even from the backseat.
just remember this: if you're getting pressured to do it - we're talking anywhere from hand-holding to home base - don't do it. that's because someone pressuring you to do something before yu're ready is always wrong. even if they tell you they love you, even if your best friend has already done it, even if they tell everyone you're a loser for not doing it. this has got to be your idea.
* Lovers say they'll die for you, but they never do.