The trick is to move that kind of activity OUTSIDE the car, that way you can admire the car and your date at the same time.

HOWEVER, it's possible, my wife and I have proven this, the passenger seat pushed all the way back and reclined all the way back gives enough room as long as she's flexible enough to put one leg between the seats and into the rear seat area.

I was absolutely determined to not have my dream car be the only vehicle I've ever owned that I didn't have sex in.