No it doesn't matter. A lot of people forgo the engagement ring. I wouldn't wear the band until the actual wedding took place .
That is your own personal opinion but in my opinion it doesn't matter (probably because I am a guy)
One use is entertainment, who hasn't indulged in that?
Another is for ambience, its been used to the set the tone for restaurants, religious gatherings, or just about any other human gathering since the earliest parts of history.