Man's love is of man's life a thing apart; Girls aren't like that. - Kingsley Amis

People who sound insincere all the time […] should not expect others to notice the difference when they try to sound insincere.

'What's that stuff they put in ships to keep them from going all over the place?'
'What? Oh … ballast?'
'That's right. People's sex drives are like ballast, they keep them steady. It sounds wrong, but they do.'

[S]omething was being kept from him. But, short of scopolamine, hypnosis or wild horses, he knew he would never hear from her what it was.