When friend A passes out drunk with their mouth open, friend B deposits semen in the open mouth of friend A. Friend A wakes the following morning and notices a cottony-textured subtance in his/her oral cavity.
After a long night of drinking, Fred passed out on the sofa. Russ had the urge to pleasure himself. Upon culminating to a gooey finish, Russ deposited his filth paste in Fred's mouth, giving him The Daytona Cottonmouth.