I find Nerys' question perfectly legitimate. She's just cautious about accidentally giving offense. Some people like to be careful about these things. I, for instance, find physically unusual people interesting, and I have to be very careful not to be seen as "staring", because that's usually seen as judgemental or, at the least, rude in the sense that people don't like being reminded that they stick out in a crowd. It's about realizing that even if your responses, body language and manner of relating to them are harmless and non-judgemental, you can still make people ill at ease, or feel embarrassed or judged unfairly, simply by the way you hold yourself or interact with them.
Sometimes it's easy to broach the subject and get it out of the way with - a boy I knew in my early teens had a very disfiguring scar that I found interesting, so I flat out asked him (after getting to know him a bit) where it came from. He was quite happy to tell me. But it's not as easy to bring it up with many people, and while asking the person in question is good advice, bringing the topic up is not easy, and might itself be seen as rude. Which I imagine is part of the reason Nerys wants to ask around and get as much advice as possible.
Also, when dealing with those of reduced height (and "little people" is indeed a commonly accepted term last I checked, no matter what some people might think of it), it makes perfect sense to check your reactions before hand, and be a little wary of what you might accidentally communicate without realizing it. I mean, for one thing, your interactions with people of that height are usually made with children. Who's to know if your body language might inadvertently cause offense by suggesting a "protective" or even "authoritative" presence that undercuts the person's dignity? You don't need to have any intention of treating them different to fall into familiar patterns and accidentally communicate something that might be discomforting. Knowing how others with more experience of the very small deal with this seems sensible to me.