Oh, Ross. Poor, multiple-divorce-having Ross. If only he had put more thought into who he was marrying, he could have avoided having so many failed marriages! We'll give him the benefit of the doubt with Carol. After all, how was he to know that she was secretly a lesbian? But the other two disasters could have been easily avoided.
Here's a pro tip: If you say the wrong name while taking your wedding vows because you're still hung up on your ex, you should call the whole thing off. Also, don't go anywhere near a wedding chapel in Vegas when you're drunk.