Thank you kindly. I had given up hope of you reading this because of those scenes. Nice to know I was wrong.
Chase likes being dominated sexually. That includes being derided and physical aggression. Being called a whore, in the right circumstances, is actually a turn on. House knows how to press Chase's buttons.
What Chase was keeping from House was the Amber/Wilson thing. The whole Pseudo-House sexual attraction between them was the main secret.