'It's crazy about how guys can make one wrong move, then go to jail for the rest of their life.'

The woman who went on a Tinder date with the man accused of murdering Grace Millane the day after her death, has testified at the High Court in Auckland on what he said to her.

The woman, who doesn't want to be named, met the 27-year-old at a Ponsonby bar, as Millane's body remained in his central Auckland apartment.

She says he told her of a 'guy he knew' who'd had rough sex with his girlfriend, something went wrong, she died, and he'd gone to jail for manslaughter.

He also mentioned how 'a lot of bodies go missing' in the city's Waitakere Ranges.

The woman says she felt uncomfortable - and didn't want to see him again.

The trial continues.