I actually do not really consider them nudes, more like realistic portraits. It is sort of a honesty thing in my eyes. If I photograph a baseball player I might include his bat or his glove or his uniform or all of the above. If you photograph a sex worker, the product they sell is their body so to not show the body seems somehow like your not taking an honest portrait or that you might be limiting the reality of what the portrait could be. What I tend to do is shoot clothed and unclothed but it seems that most times the best pictures involve partial or total nudity, not sure why but it does, maybe it fits into the visually strong thing from the original post.
Photographing a lover would have a more sexual emotional feel to it for the photographer but lover photos can also be rather coldish (Robert Mapplethorpe, Edward Weston). I just look at the nudity in my photography as functional and honest to the reality of the subjects.
But that begs the question.
Why do you choose subjects
that require nudity?