I read a newspaper article out to the Piranha which claimed that up to 37 per cent of women wet themselves when they laugh.
'That's ridiculous', she giggled, and got up off the sofa to make a cup of tea.
I stared at the damp patch with fascination.
The same article shows that up to 7 per cent of women experience bladder weakness when they make love.
Despite my best efforts the Piranha invariably laughs when we have sex.
You will understand why I sleep in a wet suit.