I shall, as usual, give the wife's arse a friendly pat as I pass through the kitchen and wish her a Happy Valentine's Day ......... she seems happy with that and always acts surprised that I remembered.
She, in turn, will not mark the day in anyway whatsoever.
The Teenage Hormone Wreck will, naturally, chase the postman down the road screaming "What do you mean nothing for ME?" and then retire to her room and spend the rest of the day texting the world to tell them how many cards she got.