Married at First Sight star Iris Caldwell feels her husband Keith Manley belief she's not sexually mature is invalid and basically ridiculous.

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During Wednesday night's episode of Married at First Sight: Unfiltered hosted by Jamie Otis, Iris watched back a Season 9 clip of Keith expressing to Pastor Calvin Roberson how he wasn't quite sexually attracted to Iris yet due to her alleged lack of sexual maturity.

RELATED LINK: 'MARRIED AT FIRST SIGHT' COUPLES NOW: WHAT COUPLES ARE STILL TOGETHER? WHO BROKE UP? WHERE ARE THEY NOW? (PHOTOS)

"That to me is so baffling!" Iris said in response to the clip.

"I don't think it's valid for him to say that I'm sexually immature based off of a dice game. I don't know why he just hasn't said any of this to me yet."

The dice game Iris was referring to was when essentially a game of dares. Married at First Sight's experts advised them to do the activity in order to get the ball rolling on their physical intimacy.

Whatever the dice landed on -- such as kissing someone's neck or even toes -- Keith and Iris were supposed to follow through with the instructions.

"We need to have a conversation about how you're really feeling, Keith, because right now, you're closing me out of being able to fix this marriage," Iris vented on Unfiltered.

Iris' Married at First Sight co-stars Matthew Gwynne and Jamie Thompson also joined her on the Unfiltered broadcast, and Matt blurted out his opinion on the topic.

"It's crazy to me how much everybody says to the experts but doesn't say to their partner," Matt pointed out of Season 9's cast members, which Thompson seemed to agree with.

"It really is," Iris said.

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Although Iris was a tad sheepish during the dice game, she sparked physical intimacy with Keith by asking him to lick edible body paint off certain parts of her body.
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This activity -- which had been suggested to the couple by Dr. Viviana Coles -- really seemed to work and turn Keith on.

But what exactly turns Iris on? "Someone's personality, like, their swagger," she revealed during the Unfiltered appearance.

Iris confirmed Keith definitely brought that swagger to the table in their marriage.

"[I like] Keith's confidence when he walks in a room and how he handles himself," Iris shared.

"That to me is beautiful to see. It's just like, oh man! Him coming home from work and just walking in is like, 'Ooh, my husband just got home!' He looks sexy doing it."

Matt and Thompson then revealed their turn-ons in a relationship.

"I think it's sexy when a girl shows initiative," Thompson noted.

And Matt explained, "Spontaneity is a turn-on, you know, somewhere else besides just the bedroom."

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The 6'9" former professional basketball player then shared, "I kind of struggle with it just because certain places are difficult for me because of my height, so just for logistic reasons, the bed is usually the best place."

In the latest episode of Married at First Sight, Keith questioned Iris' sexual maturity again when they were asked by the experts to reveal a secret to each other.

Instead of sharing something deep, sexy or personal, Iris told Keith that she had once swallowed a quarter on a school bus and was really embarrassed about it.

Keith couldn't believe that's what Iris chose to share, and he didn't know what to think at the time.

Married at First Sight's currently-airing ninth season also stars Matt's wife Amber Bowles, Thompson's wife Elizabeth Bice, and Deonna McNeill and her husband Gregory Okotie.

RELATED LINK: 'MARRIED AT FIRST SIGHT' COUPLES NOW: WHAT COUPLES ARE STILL TOGETHER? WHO BROKE UP? (PHOTOS)

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