Wayne Bryson, from Louth, Lincolnshire, made no excuses when police arrested him after his girlfriend handed in the phone.
The 19-year-old pleaded guilty to a charge of performing an act of sexual penetration with a dog when he appeared at Skegness Magistrates’ Court last month.
Bryson was also caught with £10 worth of cannabis, which he said he had ‘bought wet and was drying out’, according to the Grimsby Telegraph.
He was given bail on the understanding he is not allowed to be alone with animals.
The 19-year-old said it was the first time he had ever had sex with a dog.