Historical clue formulations

• Whispered sweet nothings — 2021-05-16
• Made bird noises — 2017-03-14
• Spoke lovingly — 2013-06-14
• Spoke sweet nothings — 2011-12-28
• Sounded soft and sweet — 2009-10-11
• Murmured — 2005-10-03
• Emulated a dove — 2002-11-17
• Acted like a baby — 1999-09-12
• Murmured — 1999-08-13
• Made dove sounds — 1996-09-16