A birdwatcher and his friend were walking through Central Park.

A bird tweets and the birdwatcher identifies it and then turns to a tree and says, 'There it is.'
His friend says, 'That's amazing. How did you hear that over the noise of all these people around us?'
The birdwatcher says, 'It's all in what you want to hear. Watch.'

He whispers, 'Want to fuck, baby?'

Female heads all through the crowd turn to look at them.