My ex girlfriend and I were taking a bus to a city that was about two hours away. We would have driven, but it was easier for me this way to sleep (and it was cheaper).
We hopped on the bus and grabbed seats in the middle. The bus filled up for the most part and we began our journey. It was a really early bus so most everyone started try sleeping. My girlfriend at the time was smaller and layed down on my lap. Had I not been so tired I would have had to fight getting an erection, but I feel asleep quite quickly.
I worked up, but didn’t open my eyes as I felt my flaccid dick being rubbed from the outside of my pants. My girlfriend’s head still lay upon my lap. I didn’t want to “wake up” and stop her, I wanted to see where she was going with this. I figured she’d stop in a minute. I had already gotten a little larger in my pants. Her hands creeped over to my pants zipper. I couldn’t believe what was happening.