Paul brings up a good point, an award highlighting writing of Good Sex scenes could at least give other writers an example of what to aim for - rather than being concerned that every sex scene in any work might result in a public shaming.
Though it can be argued that some of those Bad Sex scenes were deserving of the dishonor.
Good sex writing is usually worse than bad sex writing. Generally speaking the only good writing about sex at all is about bad sex, which is by far the most interesting kind of sex (cf. Tolstoy's happy families are all alike).
But what about those of us who, generally Episcopal, eschew "bold and experimental" sex? I'm 100% with you on the macro level, but would keep the requirements for best sex scene to a simple: "describes sex." I'd take a brilliantly written lazy morning fuck over a puerile chandelier swing any day.
Though it can be argued that some of those Bad Sex scenes were deserving of the dishonor.