You're obviously the only talented limerick writer round here, Ron!
My version of that one is:
A composer called Benjamin Britten
Was completely and totally smitten
By a singer called Peter,
No voice he thought sweeter,
And that's how the operas got written.
Well, there are a limited number of rhymes.
I had a try at rhyming Caruso, but could only come up with this:
The tenor Enrico Caruso
Had no need of help from the booze-o.
He said "A high C?
No problem for me!
I can sing thirty-five if I choose-o."
I suppose there's no need to put a name at the end of the first line. I feel that there must be a good limerick lurking that rhymes "castrato" with "vibrato". Anyone care to take up the challenge?