An Oklahoma man had a disgusting excuse for the child pornography police allegedly found on his cell phone.

"I only fantasized about sex with children," Ricky Lee Lewis reportedly told cops after he was arrested on Friday, accused of sharing and trying to obtain nude photos of young children over Craigslist.

Lewis, of Tulsa, was first arrested on Sept. 21 after he tried to get child porn from a couple over the site, News On 6 reports. That couple called police, who uncovered a pornographic image of a 3-year-old girl -- among others -- on his laptop.

Investigators also found that one person went along with Lewis' dark requests: Brittiny Linne Dick, who allegedly sent him photos of a nude toddler.

"Not only [was he] looking for couples, relationships, but had posted an ad for a playdate for his [young] son," Tulsa police Det. Danielle Bishop told the station. "It's one of the most disgusting cases I've worked, and I've been doing this a long time."

Lewis was arrested again Friday morning when forensic examination of his cell phone revealed several pictures of a young girl that Dick allegedly sent him, as well as pictures of himself committing sex acts with his dog. He also regularly sent messages to other women asking for nude pictures of their children, investigators told FOX 23.

Lewis was booked into jail on charges of child pornography and bestiality. He has a 9-year-old son, who is now in his mother's custody, according to Tulsa World.

Dick -- who can be seen in several photos with her young daughter on Facebook -- was booked on charges of manufacturing child pornography and lewd molestation.

Cops are reportedly sifting through some 9,000 text messages sent and received by Lewis. The investigation is ongoing.

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