How do you measure it up?

I think the reason why many of us get negative impression or pick on these "mismatched" couples is because what was taught to us by our environment, family, media, society, etc. If you look at every movie, magazine, comic book, etc, you'd find that the couples in there are almost THE perfect match for one another. The man is usually taller, has more body mass, and is less physically attractive than the woman. In addition, our family and friends do have a way of shaping our selection of mate. At a younger age, friends tend to make fun of each other for doing something that is out of the norm. And when a guy is dating a taller or heavier gal, he's deviating from the norm. No one wants to be picked on and rejected, so they stick to this "norm" or stereotype if you will. Stereotypes imply automatic thinking, I. E. No control. For example, when I see a 7ft 300lbs woman holding hands with a man who's 5ft 100lbs, the first AUTOMATIC thought that comes to my mind is, "whoa! What's up with that? " Then I will become aware of my judgment and reevaluate what I've seen more CONSCIOUSLY, "maybe they see something special in one another, and I am in no position to judge because I am simply not them. "
So I think the problem arise from childhood and how consciously we choose to be. We were born flawed into the world and were contaminated with even more flaws during our childhood. It is up to us in the adult stage to change and rid ourselves of these flaws.

I'm confused by your question. All of these situations are acceptable, if it makes the people involved happy. Isn't that what we're all striving for?

I'm guilty of making a statement such as this before. I saw a guy one time that looked like he could be in a GQ magazine. He was gorgeous! But his wife was extremely obese and not pretty at all, I mean she had greasy hair, bad skin, bad teeth, I just couldn't see what he saw in her. I hate to sound shallow and mean but that's how it was! I also admired him though because although his wife looked like that, whenever an attractive girl walked by, he wouldn't pay attention to her, it was as if his wife was his world. It was actually quite touching. She was one lucky lady.

Being taller or fatter makes the chick seem more man-like, to put it bluntly.

Most acceptable: tall chicks cause they have nice legs