This story is absolutely, positively true.
One day a couple of years ago my girlfriend, her family, and me were at a bar-b-que. We were about thirty minutes away from the town that she lived in and we rode with her parents. It was the middle of summer and was very hot. My girlfriend knew I didn't wear underwear on days like this so I could let my package breath. She is 6' and with slight curves in all the right places and D breasts with brown silver dollar nipples. She was mixed (b/w) with almond brown skin and looked like Alicia Keys. I am 6'4" and about 225 lbs of cut muscle (I played football in college), and I also wore some reversible basketball shorts so no one but her knew from first glance. Back them I was in a constant state of hornyness.
Well as the day wore on it started to get late and we were leaving the bar-b-que. We got everything packed up in her dads SUV. I got in on the passenger side behind her mom and her behind her dad who was driving. A couple of minutes into the drive when we got to a two-lane highway my girlfriend leaned over without warning and puts hers head in my lap. I figured she was tired from the heat of the day and wanted to take a short nap before we got back to town for the night. What I was not prepared for was I guess she smelled the musk coming from my balls. Without a word (of course) she snakes her hand up the leg of my shorts. I immediately stiffen up in more ways than one. If I had seen my own face at that moment I would have laughed at myself with the look that I had on my face. I quickly got my senses under control while still feeling her easing her way up my shorts.