[M] My first time masturbating in public

When I was 17 years old, my mother asked me to accompany her to pick up my sister from her soccer practice, we arrived too early, so my sister still did not leave her practices. After 20 minutes my mother got bored of being in the car and decided to get out to see my sister in person while I stayed in the car, at first, listening to music. It wasn’t long before I started getting turned on for some reason. first my cock started to get hard and I just caressed it gently with one hand over my pants, but it wasn’t long before it was completely erect and throbbing immensely. I needed to mastrubate so bad.
so I looked for people near by, it was already dark and from what I could see the other cars that were parked around me were empty. so, although very nervous, I decided to take my hard penis out and I started to stroke it gently.
It was a very wierd sensation at first. I was really excited but at the same time very scared that someone could see me masturbating.
After some minutes I started doing it harder and harder, i think the entire car was moving at that point but i didn’t care at all. The feeling of cumming all over myself while been in a public place was one of the best i ever had.
At the end i just cleaned everything and waited for my mom and sister to arrive.
Since then i was left with the feeling of wanting more.
Im 22 now and i think im about to do  something similar soon,  maybe in a park, or while driving. Maybe in a changing room, who knows, the posibilities are endless.