Nordling
V.I.P. AmberLander
I think the term "double standard" has a negative connotation--no matter how you choose to define it. So, with that in mind, even if liking one sexual configuration but not its opposite may indeed be a double standard in some technical, dictionary way--but because that preference is not necessarily a bad thing, "double standard" should probably be avoided in describing such preferences, as it gives an unwanted shade of meaning.