smooth as a baby's bottom (not comparable)
- (simile) Extremely smooth.
2000, Moosewood Collective, New Recipes from Moosewood Restaurant, Ten Speed Press, ISBN 1580081487, page 284:
- The texture has been described as being as soft and smooth as a baby's bottom
1993, Peter Robinson, A Necessary End, HarperCollins, ISBN 0380719460, page 316:
- His cheeks were as smooth as a baby's bottom, and he smelled good.
2004, Stephanie H. Meyer; John Meyer, Teen Ink: Written in the Dirt--, HCI Teens, ISBN 0757300502, page 89:
- He'd sanded it for hours, "Until it was smooth as a baby's bottom," he'd said, and laughed his deep, throaty laugh.