There is a profound sexiness in effortlessness. When a Groobygirl is "hot in spite of herself," it means her allure is innate. She isn't trying to seduce you; she is just existing in her truth. Perhaps she is caught in a candid moment of frustration, or maybe she is dressed down in a hoodie rather than lingerie. The "spite" is her armor, but the "hotness" is the reality leaking through the cracks.
“I am going to look my best specifically because it bothers the people who want to see me fail.” The Paradox: "In Spite of Herself" groobygirls+spite+in+spite+of+herself+she+hot
In the context of adult media, titles like typically serve as descriptive taglines for a specific "scene" or video. There is a profound sexiness in effortlessness