Re: Valentine's Day = D-Day For Many
From a statistical standpoint, it makes sense, because cheaters would be more likely to need to make some kind of demonstrable effort on this day to their cheating partners. They would take risks they might not take on other days, and if they are trying to keep their wives deceived, and also scrambling due to weather (in some areas) and taxes and stuff like that, then they're more apt to make errors of judgement in concealment.
Imagine having to go to two different florists or make two different dining reservations and juggle two different women with a shower in between...unless you have a really bad case of the flu you're in deep trouble, and pity the cheater who ends up in an accident and in traction in a hospital room and can't reach the cell phone to delete messages. Or something along those lines.
I would imagine that cheaters really detest this holiday.
If you think of it from that viewpoint, it's at least a sort of consolation that it's a day when they need to scramble and there's probably no enjoyment in it except for the absolute deception pro's rather than the 'casual, clueless cheater' - those who get a jolly from lying and lying and deception is a need for sexual fulfilment through power over other's lives.
This would make a good dark comedy/tragedy type of movie, a PI on Valentine's Day, trying to figure out the sincere from the insincere, and dealing with his (or her) own romance. Kind of like GroundHog Day, but differently themed.