He walks in   . . .

She turns and says, 'You must make love to me -- this very moment.'

His eyes light up and he thinks, 'This is my lucky day.' Wanting to keep the momentum, he bends her over the kitchen table and has his way with her.

Afterwards she says, 'Thanks,' and returns to the stove.

Totally confused, he asks, 'What was that all about?'

She explains, 'The egg timer's broken.'