Nothing, GF says it means nothing. I agree, its like men are forced to do something on that day. So it means nothing to do something when society dictates that you must.
Doing things un-expectedly is far better, as an example, last week I spent hours cleaning the whole house whilst she was asleep (I got in late from training). I put some roses in a vase for her on the table in the lounge so she would see it when she woke up in the morning in a spotless house.
Little things like that seem to work better than overblown forced valentines gestures.. (in my book
)