Sexual Act. Devil's Blush is rendered with the application of menstrual blood to a person's cheek bones in lieu of manufactured make up. One does this by fingering a menstruating woman's vagina then, using the bloody fingering, applying the fluid to the cheek. Only a small amount is required.
David noticed his sweetheart couldn't find her make up bag. Being a crafty sort and knowing she was menstruating, he reached down, fingered her bloody snatch and kindly solved the dilemma with a bit of the Devil's Blush (The).