The phrase implies a narrative arc. There was a contest—unspoken or otherwise—and Tessa won. This speaks to the competitive nature of modern attractiveness. The body is not merely "being"; it is "performing." Tessa’s butt is not just sitting there; it is actively "taking" the cake. It is a seizure of accolades through sheer force of volume and shape.
This implies a transfer of ownership. The "cake" (social capital, the male gaze, the envy of peers) previously existed in the ether, and Tessa’s anatomy captured it. This reflects the modern "Attention Economy," where visibility is currency. Tessa has monopolized the market. To say she "takes the cake" is to admit defeat on behalf of every other contender. It is a concession speech wrapped in a compliment. tessa's butt takes the cake
The verb "takes" is the most aggressive component of the phrase. It is not "Tessa’s butt is the cake," nor "Tessa’s butt resembles a cake." It takes . The phrase implies a narrative arc