Draw the bedroom curtains

Paddy met Mick in the street and said, 'Paddy, in future you should draw your bedroom curtains before making love to your wife !'

'Why?' Paddy asked.

'Because,' said Mick, 'all the street was sniggering when they saw you two making love yesterday.'

Mick said, 'Nosey buggers, well then, the laugh's on them. I wasn't home yesterday.'