Their heart and mind are still stuck there, although they may deny it, and they can not handle being in a relationship. This can show up as jealousy in someone who has been cheated on in the past. In others there may be the comparison game such as: My ex did that too and it drove me mad.
Note: One of the largest ever recorded humpback whales measured in at 89 ft. long. These marine mammals are generally either a dark grey or black color with white patches on their stomach and knobs (known as tubercles) covering their head.
The Blue Whale, the world's biggest whale. Wikimedia Commons. At about 100 feet long and 200 tons, not only is the Blue Whale the biggest mammal in the world today, but it's the largest vertebrate animal in the history of life on earth: not even the largest dinosaurs approached it in bulk.