As much use as ....

[druiaghtagh]

A roof rack on a helicopter, answerbankers, whats your favourite?

[spudqueen]

A chocolate teapot

[Hubcaps]

Tits on a Bull

[pamnez]

An ashtray on a motorbike.

[Philtaz]

We've done this recently.

As much use as:

A whicker canoe.

A handbrake on a canoe.

T*ts on a snake.

[chrisn]

An unleaded pencil

Condom machine in the Vatican

[Dom Tuk]

a carbuncle on a prostitutes arse

[frizzytwig]

....a pork pie at a bar mitzvah

[splodge24]

A chocolate fireguard...i love that one!

[NoGood Boyo]

A three-cup bra.
A one-legged man at an *rse-kicking contest.

[Whatif]

an inflatable dartboard

a waterproof teabag

[Yeah Bee]

First what is acarbuncle? and second a common one is snowball in hell

SWith pamnez ashtrey you can actually get a TV on a motorbike

[Zen82]

screen door on a submarine

[Zen82]

a homosexual with tonsilitis on valentine's day