I'm not an anthropomophizing type of person. My dogs live a dog life not a human life. It keeps me thinking constantly of dog desire/emotion over human desire/emotion because there are many many human things that are not good for dogs.
Dogs have no concept of Valentine's so I didn't bother with it. But they have a concept of gorge day... they get gorge days a couple times a month or so. Valentine's Day not necessary. But their birthdays are always gorge days. It's the one thing I do apply my human desire to celebrate!