Marriage, transference of ownership, being given away, losing your 'maiden'hood 'maiden' name, women as chattels, virginal white, rings of ownership, declaration before god, promise to obey, the marriage bed, the marital home, the marital assets, the children of the marriage, automatic parental responsibility, the wife, trouble and strife, the nuclear family, arranged marriages, forced marriages, child bride, virgin bride, consummation, annulment, divorce, divorce settlements, pre-nups, wedlock, illegitimate children, bastards, adultery, marital rape.
It's nice that we can pick and choose our traditions but marriage has a long history, a long, long list of associations, and because of its cultural value we don't get to choose how other people view it. I might say I'll get married like this and it will mean this to me and I'll pick this tradition and leave that one, but it'll still be marriage, and all the above will still surround it and its history.
That's why I choose to be unmarried.