Well, I personally get you, Seahorse. I didn't find your comment or opinion to be particularly out there, these are things I've heard mentionned elsewhere. When a girl I know started talking "soulmate" with a man she dated for barely a month, that was 10 years her senior, it sent off alarm bells in my head as well.
Which, case in point in her favor however, the relationship is a viable and still strong one even today, so I guess I was wrong. But it's not a particularly strange position, you may just have sounded a bit, I don't know..."rough"? lol.
Having 2 daughters of 15 and 10 and having been a particularly headstrong youth, I have trouble seeing men or women under their mid 20's as anything else but children as well, even though, quite clearly, they have the right to their own decisions as adults. I guess it's the conundrum of many a parent or people who actually care about other's well-being. It's not fun to see someone hurt when you figure it's an unorthodox situation. Ultimately though, it's out of our hands. You can go on a rooftop and yell all you want that the "Russians are coming!", sometimes, no one believes it until they knock at your door. There just isn't anything much else to be done.