NotNowBernard makes me thing of a woman (possibly that posh neighbour in the Good Life) lounging on a sofa with a headache whilst her husband tries to get amarous. She pushes him away with one hand, uttering 'not now, Bernard' in a slightly pained voice.
Not that I have over thought this or anything.
LadyInTheRadiator makes me thing of unlikeky plot developments, like Deus Ex Machina or whatever it's called.