I suspect that many here do not.
I got my significant other something for Valentine's Day, of course (I may be crazy, but I'm not stupid!) and yet I still do not understand the purpose of receiving fluffy things, flowers, and other ornamental-type gifts or, indeed, the necessity of having a specific day to give them. I guess this applies to Christmas and such as well, but Valentine's seems to be the day when the most absolutely pointless stuff is given.
I do not see why people give or desire gifts that serve no useful purpose. My SO still occasionally insists on giving me stuffed animal things, which I inevitably put in some mild position of honor due to her expectations, until the next one comes along and the old one is recycled to wherever women store their fluffy things. But I do not really want them, I simply tolerate them because she prefers that I do and it's not a notable inconvenience.
It makes very little sense to me. Why would you desire to waste time and money on such useless things?
Further, having a single day set aside to show affection also strikes me as odd, since I believe that most people would say that the ideal would be affection distributed throughout the year, and that there shouldn't be a holiday set aside to force you to show it.