When a male performs oral sex on a female, and the female cums, the male licks up all the secretion. After which, the female will give a blow job to the male, and at the time of orgasm, removes her head, letting the cum splatter all over the place. At the same time, the male will spit out all of the female's secretion that he has been holding in his mouth. Thus creating a huge explosion of cum.
She just gave me a Nuclear Blowjob, it was awesome