“AHA!” screamed a voice from overhead and both of them jumped; unnoticed by either of them, they had just passed right underneath Peeves, who was hanging upside down from a chandelier and grinning maliciously at them.
“Potty asked Loony to go to the party! Potty lurves Loony! Potty luuuuurves Looooooony!”
And he zoomed away, cackling and shrieking, “Potty loves Loony!”
“Nice to keep these things private,” said Harry.

Harry Potter and the Half-Blood Prince – J.K. Rowling