Ouch.

A US man is suing his ex-girlfriend in for more than $40,600 for supergluing his genitals to his abdomen.

Kenneth Slaby of Greensburg, Pennsylvania, broke up with Gail O'Toole in 1999, after dating for 10 months.

Slaby then began dating someone else but, according to the lawsuit, O'Toole invited him over to her home on May 7, 2000, where he fell asleep.

When he woke up, Slaby found that O'Toole had glued his genitals to his abdomen, glued his buttocks together and spelled out a profanity on his back in nail polish.

O'Toole allegedly told him it was payback for their breakup, and he had to walk almost 2 kilometres to a petrol station to call for help.

"This was not just some petty domestic squabble," Slaby's lawyer Grey Pratt said.

O'Toole had pleaded guilty to misdemeanour assault and served six months' probation, but her ex-boyfriend is now suing for her damages.

Her lawyer, Chuck Evans, said it was a consensual act and Slaby wasn't permanently damaged.

"This is a case that should have been left in the bedroom," he said.

AP