Surfing porn or chatting with a bud on cam or chat, playing with my sack, fingering my hole, stroking my other body parts, reaching for lube.

Tug on my balls and work the mouse.

play with my nipples

It's used for playing with my balls between using the mouse and keyboard.

...shadow puppets!

I like to squeeze my thighs together and rub my hand in and out. The sensation is great.

Same here. love finger fucking my self or yanking on my nips

my other hand is probably working the mouse to browse porn

Drive

have to agree with Roger.when wanking i need one hand to turn the pages.

If its not working the mouse, its fondling my butt - I have such a sexy butt I would love to have it massaged as someone wanks me.
Other times I may be pressing the shutter on the camera!!

I grab the base of my balls and cock with my thumb and index finder and put pressure on my perenium (taint)with my index finger. Feels good!

I yank on my balls a bit the closer I am to cumming, but usually I just tend to rest it on my chest and occasionally pinch a nipple.

If I am sitting in front of a screen, controlling the porn as others have said but when at an adult theater and stroking in front of folks I have lately been using both hands to bring myself to completion, jacking my cock with both hands, ie making a two fisted tunnel so that the "audience" can see my cock head pumping through and out the top of both fisted and then so they can see me shoot cum as I thrust hips forward fucking my two fisted tunnel for everyone to see. Gotta say that using both hands like this was a now and again thing at first until guys and couples came up and told me how hot it was to see me stroke and cum like that. Those comments got me fired up and made me look forward to doing it for people. The more they liked it, the more consistently I did it and the harder I came each time.

I usually caress my thighs because essentially wanking is an act of pure self love