He was. I think that was why this episode exists at all - the writers were like “WON’T IT BE FUNNY TO MAKE SAM BE IN HIGH SCHOOL HAHAHAHA”. (It wasn’t.) Also, fans have been clamoring for a body-switch episode for years. But they wanted a switch of the two main characters. The fans and the writers of Supernatural have a strange and occasionally adversarial relationship (the show misplaced its fourth wall awhile ago, making it possible for the show to tease its own fans; I think it’s pretty hilarious, but other people have taken it very, very badly), so I think part of this was just the writers’ way of fucking with the fans.
Nope, she didn’t know him at all. It was totally a one-night stand.
Sure, that’s as close as you can get in the real world. Problem is, it’s still pretty far away from what happened in the TV show. I’d say that being comatose, and being mind-swapped, are sufficiently distinct states that we can’t really apply the legal reasoning from one to the other. The real world legal system doesn’t account for the location of an individual’s personality, because it can only ever exist in that person’s body. In the universe described by the show, the personality is an identifiably discrete and removable unit within the human body. An unconscious person, in the show’s universe, presumably still possess the same “self” unit that defines their personality. They are still verifiably “there” even if they’re asleep, drugged, or comatose. This is entirely different from the personality being removed and placed elsewhere, to the extent that we’d need a new body of law to cover such situations. If we treated them as analogous, drugging someone into unconsciousness would be the equivalent of removing their mind entirely, and that’s clearly not an adequate legal solution to the issue.
No it’s not rape or sexual assault. It’s something else that we don’t have terminology for because it hasn’t been invented yet. But yes it’s wrong, maybe as wrong or wronger than rape or sexual assault, and you could probably find some judge somewhere willing to shoehorn it into some already existing category even though some new legislation really should be passed to deal with it.
Then there’s Stargate Universe, where everyone gets really cavalier with their borrowed bodies…
Something like this happened in an episode of Farscape, where getting hit by a malfunctioning alien weapon caused the main characters to swap minds. Crichton, while he was in Aeryn’s body, spent some time with his/her shirt open and watching his/her breasts jiggling, and it’s implied that Aeryn, while she was in Crichton’s body, masturbated (she says after the fact, “…I was in your pants”). It’s not entirely analogous, though, given that, first, the switching wasn’t caused by any of the main characters themselves, and second, neither of them had any objection to how the other was using their body (well, Aeryn did, briefly, but it seemed to be mostly that she was caught by surprise by it).
If you have switched bodies with someone else, I’d say you have a moral obligation to treat it well. Considering you know exactly where the owner is and how to contact them, there’s no excuse for not seeking their permission if you’re that set on fucking someone.