I'm not a great one for the "all fairytales are really about sex" theory, but the end of a story in YB's school reading book gave me pause...
When her wedding night came, the Youngest-of-all had a gift for her Prince.
"What's that?" the Prince smiled.
"It's my rosebud, and my little flowerpot" said the Youngest-of-all.
And the little rosebud blossomed into a rose.