What does iced coke imply?

In the TV series We Can't Be Friends, Yuan Aifei plays Han Kefei, a prey girl with a very bold background. Buying coke and selling coke are homophones of makelove.

On the surface, it means wanting to drink coke. When a person tells you "I want to buy coke", it means that you want to have sex with you. Of course, this is not absolute. Sometimes he really just wants to buy coke, which depends on the context.