A 45-year-old man reportedly was delighted when a 14-year-old girl responded to his "Taboo Sex" ad on Craigslist this month.

"Yes, I love the fact you are 14," Lee Johnson of Lake Worth allegedly texted. "I kind of wish you was a little younger. My fantasy is 11-12 years old."

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The teen, actually an undercover Palm Beach County sheriff’s official, received multiple messages from Johnson’s Samsung Galaxy phone about his sexual fantasies with young girls. Johnson is a registered sex offender, stemming from a 2010 child pornography conviction in Palm Beach County, state records show.

Sheriff’s officials met with Johnson on Thursday after he was arrested on a failure-to-appear charge in an unrelated trespassing case. Johnson denied sending the texts, claiming he wasn’t interested in underaged girls. He said someone else must have used his phone.

Officials, however, believe Johnson was behind the phone, asking the supposed teen how long he’d have to wait to meet.

"You don’t have to be scared," the text reads. "We can meet in a public place."

The Craigslist ad indicated the man was "into the very young and incest."

In court Friday morning Johnson had several outbursts, much to the dismay of his public defender. Judge Caroline Shepherd ordered that he undergo a mental-health evaluation and remain in the county jail on the soliciting a minor charge.