Originally Posted by
Danne
It's actually a rather rude question, if you think about it, which is probably why you've never asked or been asked it. I would think it akin to asking someone's age, weight, religion, or other potentially touchy subjects. Depending on the person, it can be a really heavy, controversial topic. Some people might not mind being asked (just like I personally don't care if people ask my age, weight, or religion, either) but just like with those three (and others) some people might be offended or uncomfortable being asked that.
Also, unless you're* looking to date the person (in which case I can see an exception for the "it's rude" rule, as it's probably less rude/awkward than making advances only to find out you're not the person's "type") or are a really close friend to that person (in which case you probably either already know or respect his/her decision not to tell you) it's really none of your business. It's not like it effects you unless you were hoping they're available.
Plus, I imagine some people get asked a lot based on certain behaviors and mannerisms.** That's got to get old fast.
So yes, it's annoying to get a snide answer, but it's even more annoying to be asked in the first place.
*The general you, that is, not you personally, Drolyt.
**Because of stereotypes, not because said behaviors/mannerisms actually reflect LGBT-ness