Kiss and tell
Definition 1 of 1
Pro Tip 1/3Privacy Breach
Using 'kiss and tell' implies revealing personal experiences that should be private. 
He lost a lot of friends after he decided to kiss and tell.
Pro Tip 2/3Negative Connotation
'Kiss and tell' often has a negative connotation suggesting betrayal of trust. 
It's not honorable to kiss and tell; it can hurt people's feelings.
Pro Tip 3/3Informal Usage
The phrase 'kiss and tell' is informal and might be unsuitable for professional contexts. 
At corporate events, stories that kiss and tell are frowned upon.