Profanity, profundity and unpredictable plumbing. From dickheads and corn cobs to murder most vile. From bum chafe to crushes and garrulous guile. Writing comedy is never as easy as reading it. Do you have to break a sweat to make people crack a smile? Join Meg Bignell, Kate Emery and Andrew McDonald in conversation. ABC Perth studios, 30 Fielder Street, Perth