First mile high experience was on a flight between St Thomas and Puerto Rico in a Stinson. My girl friend and I were hitching a ride home from a party in San Juan. It was cool above 7k and we had a lap blanket across our laps. She laid her head in my lap (not much room in the back of a Stinson) and slipped her hand under the blanket. What started out as her teasing me soon got me rock hard and she unzipped my jeans and pulled out my cock. Turning so the pilot could only see the back of her head she proceeded to give me a great blow while I fingered her. (The pilot’s wife was flying right seat and could see my hand moving under the blanket but I thought she was sleeping so didn’t think she was watching. I filled her mouth as we started our approach to Lindberg Field. Two days later I was working at the hanger (I worked off instruction time by working in the hanger de-waxing the tail-dragger fabric planes and doing general clean up) when the Stinson owner’s wife (copilot) came down and said she was going up for a spin and asked if I wanted to go along. She was also a pilot. We were no sooner level at 6,000 ft when she asked if I enjoyed my backseat sex on the flight. It surprised me but I couldn’t help smiling and saying yes. She promptly reached over and stroked my cock and said it had made her horny and she wanted to see what I had offered. I’m not sure how it happened but soon I was naked and she was in my lap . She handled the stick and I handled the pedals! I don’t think we were anywhere closer than 300 ft to our assigned altitude but it was a great into to airborne sex! That was the first of many airborne experiments with her. When she bought a Navion with auto pilot it was even better!