Various situations apply. Such as a group of friends are together and one of them is telling a story and provides
extra intimate details about a
person. That's TFI!
Or someone opens a bag of chips and is sharing it and one of the others double
dips and/or stick his hand in the
bag to get more chips after licking his fingers.
That's TFI!
Or A person talks about their bathroom habits or their underwear preference with coworkers.
That's TFI!
Or A coworker calls another coworker from the bathroom or bathtub.
That's TFI!