The Greatest Show On Legs 'balloon dance' caused a national outcry when it was aired in the UK in 1982. The dance involves 3 naked men dancing whilst swapping balloons to cover their genitalia.
Broadcast on a show called O.T.T., which was a late-night adult version of the anarchic children's show Tiswas and was on at 11.00pm on Saturday nights for one series in 1982.
Malcolm Hardee was the founder of Greatest Show On Legs and was one of the most colourful legends of alternative comedy, his Wiki page is here: http://en.wikipedia.org/wiki/Malcolm_Hardee
O.T.T.'s Wiki page is here: http://en.wikipedia.org/wiki/O.T.T