Just sex on a piano in general.
It doesn't work, and it didn't had to do anything my level of intoxication.
The best piece of furniture to perform the act of love upon is the Eames Lounge chair which is truly the best engineered chair in the world.
And to get back on-topic:
For me the best interpretation of the famous Fur Elise is done by Ivo Pogorlich.
He plays so soft and tenderly, his fingers merely stroke the keys: