I was listening to Die Zauberflöte over the weekend and these charming variations sprang to mind. I'd forgotten how much I enjoy them. They're Beethoven's third set of variations for cello and piano and are based upon Bei Männern, welche Liebe fühlen, Pamina and Papageno’s duet in praise of love from The Magic Flute, it dates from 1801. The music was already laid out in such a way that it was essential that Beethoven make the two instruments equal partners and so he did, the variations are a delightful dialogue with the piano as Pamina and the cello responding as Papageno.
There are some wonderful performances of both available on YouTube, really you're spoilt for choice. I picked Christine Schäfer and Simon Keenlyside under the baton of Claudio Abbado singing 'Bei Männern, welche Liebe fühlen' itself because their interpretation captures its sense of fun.1 while for the variations I picked a performance by Dragan Djordjevic and Dusan Egeric given at the 2008 Belgrade International Cello Fest. Enjoy :-)