A cruel sex offender told his victim he was a 'black belt' in attacking women before launching a horrific attack, a court has heard.
Andrew Matthews grabbed the woman's genitals after making the sick comment and did so with such force she was left bruised and crying.
The woman, who cannot be identified for legal reasons, suffers "anxiety" and "panic attacks" after the shocking incident.
Kate Morley, prosecuting, told Liverpool Crown Court that Matthews had "forcibly grabbed her over clothing" after which she "screamed" and "began to cry".
Judge Louise Brandon said Matthews had "grabbed and squeezed her vagina causing pain and bruising" in the attack earlier this year, which left the victim "feeling depressed" and "unhappy in her own skin".
He had also "grabbed her by the neck with one hand" and spat in her face before punching her. Ms Morley said there was "no physical injury" from the punch.
Matthews has 19 previous convictions for 24 offences including battery against a woman and a non-domestic violence related battery.
William Staunton, defending, said the offences "should cause him to feel shame" and to "reflect upon the way in which he behaves".
He stressed he had "no previous for sexual offending" and added he has completed a 12-step programme to address his drinking while in custody.
Mr Staunton said: "He will have time from today to sit at Her Majesty's Pleasure to sit and contemplate what he has done."
Matthews, of O'Leary Street, Warrington, was convicted of sexual assault and common assault following a trial.
Judge Brandon, sentencing, said a "particularly disgusting aspect of this offence" was his spitting at the woman.
Matthews was jailed for 18 months and ordered to sign the Sex Offenders Register for 10 years.
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