Denise Richards sharing the details of her facelift marks a shift in the culture, writes Eva Wiseman. The recent  Allure  interview with Denise Richards about her facelift at 54 is such a rich text I fear it may have given me gout. ‘‘Richards is opening up about her plastic surgery the way the rest of us talk about what we did Tuesday morning,’’ we learn. ‘‘She is matter-of-fact and unapologetic, discussing incisions, drains, and swelling.’’ The accompanying photography is startling — in the doctor’s ‘‘before’’ pictures, Richards (still uncommonly beautiful) looks pensive and a little sad, as I guess you might be if a man were about to finely slice your eyelids as if prosciutto. In the ‘‘afters’’, having surrendered to a facelift with a temporal brow lift, upper blepharoplasty, lip lift and fat grafting, she looks almost exactly as she did at 27, emerging from the swimming pool in the 1998 erotic thriller  Wild Things .…