When you are receiving oral pleasure (fellatio) and when you are about to
blow your wad, you cum in her nose which feels like when you
dive in a pool incorrectly and all that water gets into your sinuses and hurts, thus the name
brainwave.
Dude, I was getting
blown by Jessica and i just felt like giving her a
brainwave, she passed out, then I gave her
another one.
