Why do I keep humming the wedding march?

Why do I keep humming the wedding march? Its always random and when I do it feels like an involuntary thing. Like i'm not even aware I am doing it till halfway through.

This has been going on for over a year. And its not frequent. Maybe once a month or once every other month.

I'm just curious if this happens to anyone else or if it means something.

I only started dating in 2013 in the winter. But this was happening before that.

I also finally now have a boyfriend for 3 months now!

Any feedback would be a great help! Thanks!
Why do I keep humming the wedding march?
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