This might sound counterintuitive, but the novels that completely swept me away weren't the ones with the most explicit scenes. They were the ones where the tension was so thick you could feel the humidity in the room. A novel like Sierra Simone's 'Priest' builds this agonizing slow burn around forbidden desire and faith that makes every eventual touch feel seismic. The immersion comes from being inside the character's head, feeling their guilt and yearning war with each other. It’s less about the act and more about the psychological weight of it.
For a totally different vibe, 'Captive Prince' by C.S. Pacat. Yeah, it’s m/m fantasy, but the sensuality is woven into the political maneuvering and the gradual shift from hatred to something else. The power dynamics are the real story, and the erotic moments are these charged, dangerous releases. That series held me captive for days because the world felt real and the stakes were always life or death. The sex scenes are sparing, but when they happen, you’ve earned them alongside the characters.