A relationship ends.
One person was somewhat more emotionally attached than the other.
For a few weeks months after the break-up, the more emotionally attached individual frequents the other's Facebook page.
In many ways, it's self-flagellation. They should just move on; find something else rather than the inevitable pain which comes with seeing the other person happy in a new relationship while they're still wallowing in self-pity.
On Saturday, Teddy Sheringham did the football management equivalent of Facebook stalking an ex when he turned up at Stevenage's home time against Crawley - in disguise.
Five days earlier, Sheringham had been sacked after eight months in charge of the League Two side.
The former Man Utd player told The Times about his sacking and his subsequent trip to Broadhall Way.
I got the sack on the Monday and Stevenage were playing at home and I wanted to see how they reacted to my sacking, so I went to the game on the Saturday incognito.
I went in disguise, put it that way. I wanted to see what the reaction of the players and supporters would be. I just wanted to get a vibe of how things were. I’m still concerned, I don’t want Stevenage to get relegated. Was there something I wasn’t doing, was something better with me not there?
Picture credit; Pat Murphy / SPORTSFILE *EDI*