>>105169107I've got two versions in mind.
Fan service and realistic episode
For realistic Pidge and Allura swap so Pidge's chastity is maintained. Allura's body in unfeminine posture and Pidge's body moving elegantly with fancier clothes would be funny.
Lance is and Keith swap and bicker about having to be in each other's body. Lance jokes that he'll cut Keith's hair.
Hunk and Shiro swap with Shiro slightly concerned about his waistline expanding and trying to work out in Hunk's body. He realizes that weight has it's advantage in combat. Hunk tries not to eat much but keeps sneaking snacks behind Shiro's back.
For fan service
Pidge in Lance's body. Pidge takes advantage of a lanky male body and at first has fun with simple stuff like reaching things on high shelves and vaulting over stuff.
Then she goes to the bathroom and whacks it.
Lance in Shiro's body. "Yeah I'm the man now!"
Allura in Keith. Allura pretties up Keith's body and Lance is torn between his physical attraction to Allura and her personality. And Keith doesn't look too bad with his hair done and a nice gown.
Keith in Pidge's body. Turns into an emo cutie. Fingers her/himself in the dark.
Hunk in Allura's body. "Whoa this is different. REALLY different!" Also gets a little chubby. Lance tries to convince Hunk to flash Allura's tits. Hunk refuses to compromise Allura's dignity. But enjoys a nice long shower by himself.
Shiro in Hunk's body again. Shiro is for suffering.