Jody Rory Robinson has been jailed indefinitely for a serious sexual assault. (HO)

TORONTO -- A sexual sadist who terrorized a date with five hours of rape and torture was jailed indefinitely. Justice Ian MacDonnell declared Jody Robinson a dangerous offender, saying his next victim could suffer "catastrophic" injuries because sadists grow more violent as they age.

His level of violence grew from May 1996 when he attacked his ex-girlfriend in London to the horrific incident against a date he'd just met two months later.

The Crown applied for the indefinite sentence after he was convicted of the two assaults.

Robinson tortured his London lover so severely that the woman banged her own head on the headboard to knock herself out to end the agony.

In the spring of 1996 after their relationship ended, he sexually assaulted her in her London home.

He then drove to Mississauga where he bound her to a bed and he kept abusing her until he broke down into tears.

In July 1996, Robinson met a 22-year-old woman in a Dixon Rd. bar, duped her to go to his car and then abducted her, suggested she was going to die.

He drove her to a secluded spot and then assaulted her, court heard.

Robinson told her he had a gun, had killed before and she was "just a number" to him.

When she pleaded for her life during the five-hour assault, he said she was being a "baby," court heard.

After the attack, he became tearful and said, "Oh my God. I can't believe I did this to you."

The victim lost a transplanted kidney, possibly as a result of the stress of the attack and 13 years later said, "I will never get over it," court heard.

The judge agreed with Crown attorney Paul McDermott that Robinson was too great a threat to receive anything less than an indefinite sentence.

"Bearing in mind the nature of what Mr. Robinson did ... and the evidence that the conduct of sexual sadists tends to escalate, the consequences of a further offence could be castastrophic," the judge said of the now 46-year-old warehouse manager.

"Robinson's conduct toward (the London woman) was violent and degrading, but as bad as it was, the offences against (the Toronto woman), which included elements of torture, were worse," MacDonnell stated.

Robinson was diagnosed as a sexual sadist and has a borderline personality disorder that contributes to his lack of control, court heard.

SAM.PAZZANO@SUNMEDIA.CA