Ever tried this?

This technique I used was back when I was 12.I did this to cum quickly when for whatever reason, I just did not have much time. So to cum quickly, I would positions my hands on either side of my cock and then move them in opposite directions simultaneously. This put a very slight twist to my cock and stimulated it very quickly. When I wanted to cum, I just moved my hands very quickly back and forth. My cock was stimulated constantly and so I orgasm-ed very quickly. Could do this even when my parents were down stairs waiting for dinner.