In "What's my age again?", this gets a little more complicated. When Anne uses the amulet that turns her older brother Evan into Lilly, she sneezes during the spell, causing Evan's mind in Lilly's body and vice versa. Like in Birdy the Mighty, Lilly and Evan are in the same body, but they are completely different people.
AnApplegeeks arc involves Alice switching bodies with a megalomaniacal little girl.
In Sidekick Girl, the eponymous character gets switched with her useless but decorative boss and immediately complains about the cliché.
A NSFWnote Though not explicitly showing naughty bits, except maybe nipples comic by Ian Samson involves two lovers swapping bodies to teach each other what pleases them the most (which in her case, involves Wall Bang Her).
Wright as Rayne has a one-sided version of this. Vigilante Alex Rayne is forced to inhabit the body of teenage girl Dorothy Wright, but Wright's mind is in some kind of stasis.
Joked about in Questionable Content, where Hannelore thinks this is happening because she dreamed about it.
One of Lamerix's inventions in Jix caused Lauren and Jix/Lamerix/Remula (all three of Remula's personalities) to switch. The trio caused Lauren to break her arm as they were not used to walking without a tail.