New York: It's a case of complete madness! A 20-year-old man, who had sex with a donkey, told investigators here that he was forced to do the sex act because his penis went out of control after he saw the animal.

Gideon D. Swartzentruber avoided jail time after pleading guilty to having sex with a donkey. But he asked a judge this week to revoke his light sentence and send him to the prison instead.

The accused, who hails from Neillsville in Wisconsin, admitted to “encountering a female donkey and briefly having sex with it”.

In his explanation to the investigators about his behaviour, he said that at the time of the incident “his privates were out of control.”

According to a report on nypost.com, the judge slapped him with a year’s probation and a fine of $443 and mandatory counselling.

After Swartzentruber urged the court to send him to jail, the judge granted his request and sentenced him to a 30-day stint in the slammer.

Swartzentruber, a farmhand, has been fired from his job since then. His boss had caught him in the act with the donkey.

He was charged with a misdemeanor count of sexual gratification with an animal.

He said that he did not hurt the donkey and that it was the first time he had done anything like that.