Originally Posted by Iz_Gonna_Die
Does the hardness of an erection affect how well jelqing works?
Yes, the harder the erection you have while jelqing, the more pressure you create. But, jelqing while erect can lead to injury if you are not careful.
By the way. my , rather tongue in cheek, post above was saying: yes, work both. Thought it might have been a little cryptic.