Double Cum Bubble Prod is when you mold your pre-cum into two separate bubbles on the tip of you cock than you push you dick against her cunt, but you do NOT penetrate.
If you keep prodding repeatedly and you will always cum last :D
The reason its so powerful is because the girl will prepare to be penetrated but it wont come. If you keep doing it she will keep preparing and keep going and going. This is extremely exhausting for her and the technique is primarily used to weaken her so you can be better in bed
However it was banned because the consequence can be dire. Continued usage can cause serious damage to her ass and may eventually cause severe sex problems in the next 16 years.
It can also be used to punish her and shit thats why it was banned
But besides that its a sick way to get that shit pumped, baby
she was like -_- O_O -_- O_O -_- O_O
DUDE 2: Dude thats not cool she was probably hurt man
DUDE 1: Nah Im just pumping that shit homie