The first time I can ever remember having an orgasm was when I was 13 years old.
The first time I had this back massager and I laid on my stomach with it on my crotch for some reason. I realized it felt good and kept it there. Then this wave of pressure came over me and I loved it so much I did it every night. I would do the same thing, just lay on my stomach (in my clothes) and let the back massager do the work.
I remember when I had just turned 14 years old and I was still using the massager because it did not occur to me to use my fingers or anything else. But I did learn that I could do it naked. One time when I was doing this my sister who was 16 at the time walked in the door, but I did not notice until she said something. I quickly covered up and told her to leave. She did not leave and she said that she did it too. We did not do anything together or anything like that, but It was nice hearing that she did it to. I finished up once she left.