I'm a lefty.
It's gotta be the left hand for sure.

Both... at the same time

It depends on the jackoff situation. If I am in bed in a hotel, then I prefer to use the left and right arrow keys on my laptop with my left hand, while I stroke with my right hand. If I am surfing porn on my desktop PC in my office, then I prefer to operate the mouse with my right hand while I stroke with my left.

Im right handed so mostly right, but when on comp. Sometimes i use left when clickin thru stuff.

I am left handed, however I much prefer using my right hand. It seems to wrap around more naturally.

Right handed but a south paw stroker. Like hornycummer, my dick seems to fit better in the left.

I'm right handed, but I usually stroke with my left. It's better to stroke with the left and type with my right (when I'm jacking on cam)...

with the right every now and again i use my left

use left as I am using the right on the mouse!

I usually start with my left, smearing lube and stroking to hardness, feeling it build. When I go deeper into my bate and it gets more intense, I end up inevitably going to my right hand for hard, intense pumping.

An interesting observation, Mike. I'm ambidextrous but came to the same conclusion as you, quite some time ago, about the same time I started using the computer. Like thikbone, I use my right hand on the mouse.

Right hand as much as possible. Left hand to keep the edge going while right needed on the mouse at the computer. Right hand while typing on keyboard with left. Right, then left, alternating constantly while clicking porn on the screen and/or chatting with someone. Jiggle, pull, massage balls with left hand while stroking cock up, down, and circular with right. Rub nipples with fingertips of left hand. Stroke hard to orgasm with right hand. Always finish with right hand. Cum frequently squirts on left hand, but somehow gets on both hands ;-)

i always start with my left and finish with my right, unless im using my vibrator, then i dont use either.

yeah, on the part that doesn't fit into the fleshlight...right?

Left when im surfing or typing but finish up useing both always