Again this narrative isn't as exotic/erotic as some told here, but it is 100% true.
I met this girl at a summer camp the summer before my senior year in high school. She was a year younger than I. We were mutually attracted and started dating. We lived about 50 miles apart, so our meetings were a bit sporadic the first year. After I completed my twelth year I enrolled in the University in the city where she lived and we started seeing each other regularly. We gradually worked our way through kissing, French kissing, heavy necking, breast fondling over clothes and for some time had been engaged in breast fondling skin to skin. I could unhook a bra in the dark with one hand behind her back in seconds.
On this occasion we had been parked in a secluded area and were French kissing as I fondled her bare breasts. After some period of time we came up for air and I had leaned my head against her breasts and my hand came to rest on the mid calf of her leg. After a short period I decided to explore further, fully expecting her to push my hand away and was delighted when she didn't. I very gradually slid my hand up to her knee, then slowly up her thigh until my fingertips were on her panties. Still no resistance and she opened her thighs a little so I pushed the panty crotch aside and started rubbing her pussy lips. We were both breathing heavily by this time and eventually she gently pushed my hand away.
I immediately apologized for going so far and she declared it was equally her fault for not stopping me sooner, etc. We drove away, both saying it would never happen again, and both knowing full well that it would happen again at the first opportunity.
After that we developed a routine for our mutual enjoyment. We would drive aimlessly in my car. I would be unzipped with my boner sticking out. She would lie on her back with her head in my lap, her hair touching my boner. (Bench front seats and no seat belts in those days.) I would reach out with my right hand, unbutton or unzip her skirt or slacks if necessary, slide my hand under her panties and rub her pussy lips with my middle finger. I could feel her lips become tumescent and a little knob swell up at the top of her lips. (After learning a little bit more about female anatomy I realised that this was her clit.) Once in awhile I would rub too vigorously and she would have a massive orgasm. When this happened she wouldn't let me touch her anymore that night, so the object was to get her to the edge and keep her there and we would drive for hours with my fingers massaging her lips and clit.
She never touched my boner, which was just as well because as long as I was touching her I kept a rock hard boner, staying on the edge myself. One stroke and I would have cum. Staying on the edge was a delicious feeling and relief would come later.
These nocturnal drives continued for months until we segued into other sexual practices not within the subject matter parameters of this site.