Jelqing with one hand
I just wanted to share my opinion here that I find it more useful to jelq with one hand only rater than using both hands. I do it in the following way: while stroking with the right hand my left hand stays at the base with which I prevent the shaft skin from sliding over towards the glans. I think this is a good way to prevent turkey neck.
Basically the only benefit of jelqing with both hands that I could think of is that you get that constant milking motion, but one-hand jelqing gives you a pause of 1 sec between strokes, not more, so I think that doesn’t really make a difference.