Susanna Reid told Piers Morgan to attend therapy after he claimed to be a relationship expert.
The "Good Morning Britain" presenter was left bemused by Piers, after he claimed that when a couple puts on a public display of affection, it means that their relationship is on the rocks.
Speaking after watching a clip of Prince Harry's first public appearance with girlfriend Meghan Markle in Canada, Piers said: "When a couple get really tactile, that's when they're going to split up.
"When you go out to dinner with a couple and they're all over each other, really overdoing it, that's when you know [it's over]."
But Susanna, 46, refused to accept Piers" claims, and instead insisted he should seek some professional help.
The popular TV host snapped back: "You need therapy."
And Susanna subsequently turned the spotlight on Piers - who is married to fellow journalist Celia Walden - telling him he is "misinterpreting" how people interact with him.
She said: "I think you are misinterpreting people's reactions to you."
On Monday (25.09.17), Piers annoyed his co-star by discussing Prince Harry's sex life on air.
Piers described Meghan as the woman Harry "is having sex with", which Susanna felt was a rude and inappropriate remark.
Reflecting on the debate - which stemmed from the Prince and Meghan not sitting together at the Invictus Games in Toronto - Piers said: "When have you ever been to a sporting event when you're 50 metres from the person you're having sex with?...
"Can we say that at this time in the morning?"
A visibly surprised Susanna replied: "How come we've got to 12 minutes past 7.00 and you're saying that on the television?
"Can you not saying "sharing a room"?"