When you have a boner and your push your dick downwards between your thighs, adding lots of lube, your rock back and forth until you finish.
"the rocking Chair" is my favourite way to masturbate... you have to be careful though or you will cum on your own ass.
When you place your dick between your bicep and forearm, in the crease of your elbow, then moving your arm back and forth to Masturbate.
I don't have a girlfriend and I'm sick of normal masturbation.... I'm going to "chicken Wing" it tonight!