It’s landlocked, so nobody can wear their itsy bitsy teeny weeny yellow polka dot bikini on the beach in Eswatini.
The ladies don't have to. They still have the Reed Dance where the young women dance bare-breasted in front of the King. He chooses a new extra wife annually. Last I read, many years ago, the King was up to 14 wives.
In itself, that might be a violation of Amendment 8 to the Constitution which prohibits cruel and unusual punishment.