Getting under one's hat

"Getting under one's hat" is a Smurf figure of speech in the EMPATH: The Luckiest Smurf story series that means a Smurf is seeking intimate relations with another Smurf, usually a male and a female. It is actually part of a marriage consummation ritual that the female Smurf initiates by reaching her hand underneath a male Smurf's hat and feeling around the baldness of his head, doing so until the male Smurf's hat drops off his head. Because a male Smurf's bald head tends to be rather sensitive to a female Smurf's touch, it has a stimulating aphrodisiac effect on the male Smurf. The male Smurf then reciprocates by reaching under the female Smurf's hat and feeling the hair on her head until her hat also drops off her head. By then both partners should be stimulated enough for intimate activity.