OK my turn to ask for help from the vast SDMB collective unconsciousness.
The story I vaguely remember is at least a decade old and probably more; not sure if it was a novel or something shorter. It is about a small group of astronauts or space travelers (I think) who land in a society based around a kind of rural neo-paganism (similar to Robert Graves’ ideas), with one of the highlights a midsummer sacrifice of the stag-king. One of the travelers is chosen as the new stag-king, and has actual horns surgically implanted into his skull. While the general flavor of the society is rural and agricultural, the travelers discover the horns are sophisticated bio-technology (although I think this story predates that particular term), which pump all kinds of hormones into the recipient, making him as active, strong, libidinous, and short-sighted as a good stag-king should be during his half-year of excess before midsummer. I can’t remember how the story resolves (if I did, would I be so driven to find the !%^$ thing that I’m posting here?).
Any Dopers recognize this?
While it’s kind of similar in theme, this is not Robert Grave’s *Seven Days in New Crete *(which I have read); the one I’m thinking of I recall being grounded in science not fantasy.