A visit to the sperm bank must rarely be an amusing experience for anybody, and its comedy value has already been extracted, bottled and labelled by humourists with far greater skill than Damian Callinan demonstrates here. The archetypal Aussie's hour onstage is clearly a form of (questionably advisable) therapy, in a textbook case of highlighting and mocking his lack of fertility before anyone else can. While there is no doubt that he has suffered a great deal of anguish due to his problems, the show is all too appropriately, er, shooting blanks when it comes to the jokes.

Sporting a nurse's outfit, handing out specimen jars and at one point taking off his trousers and threatening to provide a sample, Callinan provokes everything from bemusement to downright white-knuckle terror in the audience, including an enviable walkout. But the laughter is all too rare, and it's ironic that claiming to 'take on the taboos of men's trouser troubles' sadly (or inevitably) ends up being a load of bollocks.

Gilded Balloon Teviot, 668 1633, until 24 Aug, 6.15pm, £8.50–£9.50 (£7.50–£8.50).