A reverse creaming is performed while in the act of
jerking off your male partner.
The crux of it is in tricking your partner to believe his ejaculate will land either on you or around his penis,
at the last moment before
ejaculation; you are to aim your partners penis towards his face suchthat the ejaculate will land squarely in his face.
It's supposed to be surreptitious in nature, but
consensual reverse creaming are known have happened