Legalising drugs, opening up brothels, taxing the Great British Motorist - not much seems off limits at the Liberal Democrats' conference in Brighton.
But if there is one taboo; one word which must never be uttered in polite beard-and-sandals company; it is the h-word - as in hung parliament.
For the first time in at least a generation, the party - backed up by the pollsters and statisticians - is reasonably hopeful there will be stalemate after the next general election, with no party having enough MPs at Westminster to have an outright majority.
For the rest of us, that might sound like a democratic deadlock. For the Lib Dems it's a political wet dream.
They would almost certainly be courted by both Gordon Brown and David Cameron to form a majority power-sharing coalition.
But mention the "hung" word in Brighton at your peril.
For a start, the party prefers the more optimisitic, nuanced sounding "balanced parliament", suggesting a harmony of evenly competing interests and groupings, like the Bundestag, which saw almost a dead heat between the centre-left SPD and the centre-right CDU/CSU in last year's election.
More critically, Sir Menzies wants to keep his suitors on their toes. At the Independent fringe last night, ringmaster Steve Richards was almost lynched by the normally docile Lib Dem activists when he attempted to call for a show of hands on whether party members would prefer to get into bed with the Tories or Labour.
Out of a room of more than 500, a tentative 25 or so raised their hands to show a preference for the Conservatives, amid much booing and heckling - aimed at the chair for having the temerity to ask the question, not the centre-right delegates.
With a swelling ugly mood ("Would you ask this question at the other party conferences?", "This is the Independent, not the Sun!"), barely a dozen dared bare their hands to express a preference for Labour, although that is undoubtedly where the centre of gravity for most members lies.
Sir Ming himself broke the taboo twice yesterday by uttering the "hung" word on stage - but only to reject the idea of campaigning for a parliament hung, drawn, quartered or even balanced.
