The thread is about just what it sounds like. I’m looking for instances in movies in which an actress or actor appears naked for no reason other than inspire 17-year-old kids to watch the movie; and, contrariwise, instances in which the performer should, by all reason, be naked, but is not.
(And we can go ahead and mention the magic L-shaped sheet in post-coital scenes just because it’s inevitable.)
I’ll start the bidding with one instance of each, from the very same movie. Carla Gugino’s nakedness in Sin city makes very little sense;* why, exactly, does she not throw on a robe when Marv comes to her apartment? And, later in the movie, Jessica Alba has two scenes in which she should by all logic be naked. In the first she is at work, as a stripper, in a strip club–on stage–and yet is clothed. In the second she is the captive of the Yellow Bastard, who intends to torture and rape her and has already begun the former; yet for some reason, all the naughty bits are covered.
Anyway, that’s just me. Anybody else?