Serious Question: Is there a wrong way to Masturbate?

[Marble]

When i jerk off, i rub my penis up against my left thigh...

But when other guys at my work joke around about how they make that up and down movement... i know what they mean, but i can't get off doing that.

And i don't wanna do it the wrong way so when i get into the sack i don't rub my penor against the girls leg!

Is there a wrong way to Masturbate?