Quick jelq question

Just wondering,

while doing jelqs with two hands, are you supposed to keep theb blood trapped in the penis shaf(head? Or shoudl you allow a millisec gap of loose grip to get new blood in, between each stroke????

I allow a millisecond sometimes, and then there is periods where I don’t. I’m actually waiting for a reply on this too!

I always allow millisecond between grabs. In my opinion it becomes more difficult in doing it the other way while you still get similar results.