PM Gillard's boyfriend Tim Mathieson

4BC News: The Prime Minister's partner Tim Mathieson is in hot water over a joke about prostate cancer and Asian women.

Mr Matheison cracked a joke about digital examinations for prostate cancer to members of the West Indian cricket team at a reception at The Lodge in Canberra on Monday.

But the opposition says it's no laughing matter, with Liberal MP Kelly O'Dwyer saying the joke was tasteless.

Listen now