Pea, Pee or P

A friend of mine emailed this to me:
".... I ask 4-year old* if she would like to go and see 'The Princess and the Pea' at the theatre, and she asks 'Does the princess pee on stage?'.

Then I ask husband* if he would like to take daughter to see 'The Princess and the P' at the theatre, and he asks 'What, is it about drugs?'

Don't you love the English language.

* Names obscured to protect the very young and the very stupid.