Didn't Eddie Murphy already do the opposite of this skit?

“White people walk with they butts real tight.”

1983 film Trading Places with Eddie Murphy and Dan Ackroyd didn't have disguises but covered similar territory of racism and parallel experiences youtu.be/vEaXAsbvHV4

Trading Places - Official Trailer 1983

A snobbish investor and a wily street con artist find their positions reversed as part of a bet by two callous millionaires. (IMDb) Release: 8 June 1983Genre...

Yeah, "White Like Me." I could swear Richard Pryor did the same thing on SNL a few years before then, but I can find no evidence on the intertubes.