If your taste in erotica includes science fiction or fantasy, you probably already know Cecilia Tan's work. This story, the first half of the epic (in several senses) erotic serial she began web-publishing about two years ago, is an intoxicating mix of sex, romance, magic, and political intrigue, with a few fight scenes thrown in. A pampered prince and his whipping boy, who bears the punishment for the prince's transgressions, are separated by a deep-laid plot just as their childhood attachment blossoms into an adult romance, and both young men must spend time with many other partners before they are reunited.
Prospective readers should be aware, however, that themes of dominance, submission, coercion, and consent are central to this story. Most of the sex scenes qualify as BDSM, and many of them are brutal and coercive even by the mores of the fantasy setting. If you don't like BDSM fiction, or if you like scenes in fiction as in life to be carefully negotiated, safeworded, and rounded off with cookies and a hot beverage, then The Prince's Boy will not be to your taste.
If you do like bondage, flogging, and dubious consent mixed in with your true love and heroic deeds, this story will satisfy. As Tan points out in her preface, it was written as a weekly serial, and thus every single chapter packs a hard erotic punch. In fact, you may find yourself in a bit of a daze while reading it. My only complaint, if I should call it that, is the almost complete absence of female characters; Tan can write strong female characters with sexual agency better than most, but here she has created a stringently masculine world of kings, soldiers, and magic that derives its power from the forbidden lust of man for man. I recommend it for the adventurous reader.