Dermot O'Leary was in hysterics on Wednesday's This Morning as he and Alison Hammond interviewed a personal tutor.
Matt Knott has written a book about his experience of tutoring children of the super rich, and he certainly hasn't held back on sharing anecdotes.
As he chatted away to Alison and Dermot on the This Morning sofa, the conversation took a sudden turn as Matt revealed he was spanked by a customer - who just so happened to be a Russian oligarch.
Speaking about why he decided to become a tutor, Matt said: "I needed a way to pay the rent and I heard about private tutoring and being a study buddy.
"At times it was like I was being paid to be friends with the mothers some times. There were some who really enjoyed spending time with the tutor and even got drunk and confessed their marital woes to me," he confessed.
Referring to Matt's book, Alison then asked: "You spent some time in the sauna with someone's wife?"
Matt replied: "They sent me out to Moscow because there was an oligarch who wanted his son to get into Eton.
"So I had been spending a lot of time with the oligarch's wife to the extent that we had given her sin the nickname 'Little Piggy'.
"But that natural evolution was that she got the nickname 'Mummy Piggy' and I was 'Daddy Piggy'," he added as Dermot looked confused.
"But what about the real daddy?" Alison then probed, but she clearly wasn't expecting Matt's response.
"He learnt about these nicknames but he wasn't angry or anything," he explained.
"I think he just thought, 'it's time for me to bond with the tutor'. So he invited me to have a sauna, which being an oligarch, he had one in his basement. So he walked in completely naked..."
"Who's Daddy Piggy now!" Dermot blurted out as Alison started laughing.
"Yeah he was showing me who was boss and it was surreal because there were speakers playing a panpipe version of Bridge Over Troubled Water. There was a disco light kind of rotating and we were wearing these felt caps that you wear to keep your heads cool..." Matt continued.
"And then part of the traditional Russian banya experience is that you get spanked," he added as Alison lost control and was heard laughing really loudly.
Keeping composed, Matt then said: "So there's not a line in the tutoring handbook about what you do when a Russian oligarch offers to spank you in a sauna."
"This is so surreal!" Dermot commented as he and Alison asked whether he had allowed himself to be spanked.
"Oh I mean the client is always right, so I let him spank me as much as he liked," Matt admitted, but this just set Alison off even more.
This Morning airs weekdays at 10am on ITV and ITV Hub.
