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When you hold back your cum for so long that when you finally let go, it's like a giant cum explosion that goes all over the wall, like it's trying to erase the previous paint job.
I held back for 2 hours, and then I shot cum like a fire hose, and the wall got a cum shower.
My cum was so strong, it painted the wall in white, and I didn’t even need a brush.
I waited until the last minute, and then my cum went wild and splattered the whole wall.