An adult cake typically refers to a cake that is designed and decorated with themes, images, or elements that are more suitable for mature audiences. These cakes often feature humor, suggestive imagery, or playful themes that may not be appropriate for children. They are commonly used for bachelor or bachelorette parties, milestone birthdays, and other adult celebrations where a lighthearted and sometimes risqué tone is desired. The designs can range from subtle innuendos to more overt and comical representations, depending on the preferences of the individuals involved and the nature of the event.