To be young again
At about age 10 I was in the shower when my Mom said she had to use the bathroom. I didn't realize there was a small hole in the shower curtain and she was sitting on the toilet changing her sanitary napkin. I have never seen any woman exposed like that as she was sitting facing right at me.
My little dick got rock hard and I proceeded to wack off watching my Mom. Within seconds I felt the tingling start in my penis and spread so intense I had to stop because I thought I might hurt myself. A few years later at about 12 I woke up in middle of the night and heard my parents making love. This time I kept stroking it for a long time. No cum, just great tingling feelings I only wish I could experience again. Shortly after when I tried stroking my dick, I came and never had the intense feelings again.