I learned from watching horses as a child that doing things when you have a hard on feels really good. I stayed at the farm with just me and my grandparents a lot and spent many days with them. I would regularly jack off secretly because always being nude and not shooting cum yet made it easy. Easiest was waiting for breakfast, grandpa was usually outside and grandma was occupied with cooking I sat at the table on my towel for the day usually rubbing my penis till I came, if she turned or looked at me I would stop maybe tap my lap act like im waiting. As I got older it was harder to do secretly, I remember one time I was mange 14 and was so close to cumming but my grandma asked me to take the trash bag out she was doing the morning dishes and I didn't worry about walking around with my raging boner dripping precum. I finished outside while walking back to the house.