He told the court he and his lover 'often used vegetables' as a substitute for sex toys, the Mailonline reports.
He said he had met Rica in 2004, their relationship turning sexual five years later. He invited her around to his place where the cucumber was used 'to pleasure her.'
He admitted that they had drunk four bottles of wine between them and several glasses of schnapps. A post mortem later showed that she was nearly four times over the legal limit to drive a car.
He told the court how after the cucumber had served its purpose
'I put it it in her mouth. But suddenly I saw there was smoke coming from the kitchen. I forgot that I had put a piece of meat on the stove for my dog.'I ran to the kitchen, fed my dog and then went on to the balcony to smoke a cigarette.' He said when he returned to the bedroom, Rica was unconscious.'I tried to get the cucumber pieces out of her mouth,' he said, 'but they were so mushy I couldn't get any purchase at all.'Medical experts later said that the cucumber got wedged in her throat, cut off her air supply and plunged her into a coma.
'The defendant must have known that he should not have left her for so long on her own, said prosecutor Reinhard Hoffmann.