Most of you probably know all about it by now, but I to search for half an hour to find an answer to my question, so I guess this particular link will be useful to someone else down the road, too:
Ed Greenwood about underwear in the Realms. Just enter "underwear" and you'll see the post. It's LONG, too.
The coolest part is quoted below. The funny thing is, in my headcanon people never walk the streets naked in the Realms(unless they're starving kids from Memnon) - never! I'm a prude. But...
In warmer climes, both genders often signal their desire for sex by walking naked in moonlit gardens, or naked except for finely-made, ‘show’ high boots, headgear (often with face veils), and to-the-elbow gloves (an overcloak is usually worn to reach the gardens -- and if the gardens aren’t private, kept on until a desired partner is met).
Foreplay among elves and half-elves (particularly strangers) often includes the wearing of full-face masks or hoods that leave bare only the ears -- and caressing, kissing, or licking of ears (plus throat, backs of knees, and palms of hands) for and by both partners leads to more ardent activities.
... I'm going to Evereska. It should be warm enough, right?
(Sigh. There's a LOT of snow here).
Besides, in my view, elves should behave with a bit more modesty and taste, and probably not get into heavy petting and such unless they're engaged (I prefer a bit more Tolkien in my elves, thank you) 
As that's what is to be expected 
... yep, it's the internet, not the people in it, after all...
