only 19 per cent

[denise hine]

only 19 per cent of us do this what

[Buffy]

Sorry to be gross, but the answer might be "wash our hands (with soap) after using the toilet". There was a study, not long ago, in which researchers spied on people using airport washrooms, and observed this to be true. I don't recall that the exact percentage was 19%, but it was close... I don't suppose you have any other clues for us? ...My answer might not be the one you are looking for.

[jenstar]

Speak more than one language (in the UK). I have absolutely nothing to back this up, but who knows? It could well be correct.

[sft42]

It could be anything....We need context!

[FTVS]

have sex on our wedding night

[lisaj]

Get included when some researcher picks a random 19% of the population...

[Kerplunk]

Answer bizarre questions posted on Answerbank?

[Phantaxus]

Kiss significant other goodbye in the morning