A Rothwell man is being held on remand after he was caught by paedophile hunters.
Lloyd Bishop thought he was speaking to underage girls about a sexual relationship when he messaged them on online platforms.
But all along they were decoys used by a group who posed as children to snare online sex offenders.
The 29-year-old, of Bridge Street, was later arrested by police and charged with two counts of attempted sexual communication with a child.
He pleaded guilty to both offences when he appeared before magistrates, who remanded him in custody.
The offences took place just days after he was given a suspended four-week prison sentence for possession of a knife.
In that incident members of the public called police when they saw him with the black-handled kitchen knife on April 14.
Bishop will be sentenced by a judge at Northampton Crown Court next month.