When Newton was in a “romantic” mood he wrote…

Universal law:

“Love can neither be created nor be destroyed; it can only be transfered from one girlfriend to another with some loss of money.”

First law:

“A boy in love with a girl, continues to be in love with her and a girl in love with a boy, continues to be in love with him, until on unless any external agent (read brother or father of the gal) comes into play and breaks the legs of the boy.”

Second law:

“The rate of change of intensity of love of a girl towards a boy is directly proportional to the instantaneous bank balance of the boy and the direction of this love is same as the increment or decrement of the bank balance.”

Third law:

“The force applied while proposing to a girl by a boy is equal and opposite to the force applied by the girl while using her sandals.”