Growing up in the South in the 60's, air conditioning was not widespread and it was common for boys to 'camp out' in the back yard during the Summer.
When I was 14 I had become friends with a boy from my church youth group who was a year older than I and he asked me to sleep over at his house on a 'camp out'. I was excited because I did not frequently get to sleep over at other houses as my parents were rather strict.
On the appointed day I arrived as scheduled after supper and we watched some TV and then adjourned to the back yard at bedtime. George and his brother kept a tent set up all summer as they frequently slept outside as it was cooler than in the house. We did not have sleeping bags but old quilts on which we slept without cover. George suggested that we sleep in our briefs; mine were fruit of the loom and his were Jockey. I thought the Y front looked funny but not his large bulge. We had flashlights but no other light source. We played cards but the batteries soon started dimming so we turned off the flashlights and laid there and talked.
George was very bold and asked if my dick ever got hard. I replied that it did all the time and that it was hard then from admiring his large bulge. He asked, 'How big is it? Can you touch your navel?' He then reached over and gave me a feel. I got fully hard and reached over and felt him. His dick was larger and went well past his navel. We began stroking each other and quickly came. This was the first of many such explorations and led to many more encounters with other friends.