Guess who benefits from V-day

Everyone knows that lot of money is spent for toys, cards, jewellery and what not for V-day. I have even seen ads saying "To show your love, gift her our washing machine". So, its obvious that its big business for all the guys. But today I read about another group of people who do brisk business during this time. And these I felt, were the most unlikely group, private detectives. Seems in the US of A it is this time when lot of partners engage the services of detective agencies to find out if they are being cheated, because its easier to catch them :P. If they get a negative answer they can celebrate V-day in its true spirit :-). So much for celebrating love.