Cake sitting is a sexual fetish where, as you might have guessed, people sit on cakes for sexual pleasure. It's considered a subcategory of the "wet and messy" fetish (WAM), a form of sexual fetishism in which a person becomes aroused when copious amounts of a substance are applied to the naked skin, face, or clothing.
Part of the pleasure of cake sitting is physical, derived from the tactile sensation of the individual’s body meeting with something that is moist, messy and squishy. “Cake sitting and sploshing is all about the textures and sensations" adherents. “The squishing and the soft and wet and cool and sticky. I love feeling those things on my thighs and on my pussy.”
Another aspect of the pleasure can be psychological: the taboo of indulging in something that is kinky giving some individuals a sexual charge. Ryan says she loves how quickly sitting on a cake can go to smearing it onto her lover, followed by them rubbing it all over each other and licking it off. Her sweet tooth might also have some influence.
One of the reasonsstated is actually quite simple: “It’s fun. I like cake sitting because it’s playful and ridiculous, and I don't take anything too seriously. It also feels a little empowering to smush. And to see the little flattened cake and shape of your arse in its destruction.”
Mistress K, happy to try new things.
This was taken from an online article here.. https://www.vice.com/en_au/article/neqd5g/inside-the-sweet-sticky-world-of-cake-sitting-sexrated2018