No one has more fun writing about sex than CupcakKe, and “Blackjack” is pure, unencumbered dirty talk. Her newly released single is replete with the Chicago rapper’s signature, not-so-subtle innuendos and spontaneous puns. CupcakKe’s songs aren’t exactly for the puritanical among us but she is never overbearing. The bluntness is part of the charm: “One stroke in, he gon’ lay down/Kids all on me like a playground,” she raps. Her lover “call cause the pussy smell like Dial soap” and he “come quick like Amazon Prime.” Over xylophonic production from Bizness Boi & Ye Ali, she is constantly switching flows, contorting her shapes and slipping between the strobing synths. There are few who could execute this and even fewer who’d attempt it. In CupcakKe’s capable hands, a game of chance somehow becomes a surefire way to get lucky.