When a couple is having sex outside, in generally hot weather (90 and 100 degrees), the man will ejaculate on the woman's face, and the heat will 'cause the cum to "bake" on her face.
Antonio: Ayo, I just gave that hoe an easy bake oven, shawty. She still tryna get the nut of her face.
Justin: Word? Damn...tell her what's good!