Ever wanted to masturbate while reading solotouch, but the parents are nearby? Well your problems are solved, because this technique is subtle and great for girls too I assume, as there would probably be a little penetration.
Anyway, to do this technique, what you need to do is be perched on top of your computer chair (That means sitting normally but with your legs up on the chair in front of you.) Now, open your legs slightly, and put your elbow against your penis or vagina and put your hand on your chin like you're thinking, or anywhere else that you find appropriate.
Now, grind your elbow against your wet penis or vagina slowly, you cant be seen, as your legs are hiding the movement! just make sure your movements don't get too extreme, lol. If females are wearing a miniskirt there might be a chance of getting a little penetration using your elbow (Sounds a little weird, but I'm sure its good) and for the males on point of orgasm, press your penis down and try to make your foreskin cover the head of your cock. Slowly take your elbow away, and let your foreskin slide slowly down, which should push you into orgasm.
Happy jacking and jilling everyone, any replies on thoughts or experiences on this technique from males or females would be great!