Thanks for sharing, Aaron – I think you'd find similar experiences among other cuckolds.
For me, I can see the roots of my sexuality in my childhood as well. When I was in 6th grade I had a girlfriend who was almost 2 years older than me and we 'played doctor' quite often. Her breasts were already developing nicely and she became the first girl I 'gave' to others when I allowed some of my friends to see and fondle her breasts when I was present. Somehow I knew she wanted to be shared that way but needed to not have 'choice' in the matter and be 'told' to show them and be 'told' to let them fondle them. She was always anxious during these encounters, but extremely excited following them – a pattern I see in submissives every day.