Banana, cake, peach, eggplant, sausage, whipped cream, cherry. Something about certain foods steers the brain towards images of the erotic, and entertainment media knows it.
In visual mediums, food is often shorthand for sex. A cheeky, not-so-sly metaphor. Romance in particular loves edible innuendo. It’s easy to use a juicy, dripping peach or artful dollops of whipped cream as a stand-in for what you really want your audience to be thinking about.