
Esther Perel has explained why all cheats have something known as 'deadness' in common.
The experienced Belgian psychotherapist is considered one of the world's most insightful experts on modern relationships, intimacy and sex.
Perel knows how to keep the fire burning in long-term relationships, but can also spot when someone has multiple matches in their back pocket.
Infidelity, as awful as it can be, is actually pretty common in Britain, with one in five adults admitting to cheating on their partner at some point.
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But one thing all of these cheaters have in common is apparently 'deadness', Perel says.
The psychotherapist and author of Mating in Captivity and A State of Affairs said that, in her research, the horrible-sounding term keeps coming up.

What is deadness?
Fellow dating expert Jess Matthews, who has looked into Perel's research, says that 'while the word may sound dramatic, it's actually the opposite'.
"It quietly describes a state that creeps into many long-term relationships: a feeling of emotional numbness, disconnection, and personal erosion," she wrote for Mama Mia.
"As to which comes first, that's a chicken and egg type complexity."
Matthews explained: "Deadness is something that we can experience as an individual (as part of a couple) or feel applies to the dynamic of the connection.
"It's the internal monotony that may come from routine, emotional repression, lack of novelty, or the fading of desire.
"Whilst you still love your partner deeply you'll be equally plagued by feelings that something is missing."
What deadness looks like

Matthews says that someone who has deadness is likely to experience the following four symptoms:
• Feeling more like friends
• Bored of their personal life
• Tired by always being the 'parent' or 'peacemaker'
• A lack of spontaneity and intimacy
How deadness leads to cheating
The founder of 'The Boy Detox Course' said that Perel's research reveals that cheaters generally don't cheat with the sole intention of hurting their partner.
Rather than the feeling of deadness, people who cheat 'want to feel alive again'.
"From what I have seen infidelity most often comes down to selfishness, and by that I mean cheating is a by-product of a feeling of lack or insecurity within oneself," Matthews adds.
"Cheating is an escapism; it can provide a type of 'resurrection of the self', and also a deflection from the real issues at hand."
Topics: Sex and Relationships, Dating trends