It's easy to get tongue-tied and accidentally say something rude, as you'll know if you've ever watched one of those compilations of TV slip-ups. Often just switching two small sounds in a phrase will result in an embarrassing, or even obscene Spoonerism!
Try reading these out loud, ONCE, but not within earshot of your grandmother... just in case!
The acrobats displayed some cunning stunts.
Sir, you are certainly a shining wit.
He fills her soul with hope.
It's the Tale of Two Cities.
Have you brought your sleeping bag?
She is sure pretty.
Have you seen her sick duck?
Oh, the suffering of purgery on my soul!
He's not a pheasant plucker.
She showed me her tool kits.
He's a smart fella.
A hot pie would make me happy.