What are the standards of attractiveness of various races in D&D, both female and male? What I mean is, for example: what in orc society is considered attractive in a female/male orc by other orcs? What about elven society? Or halfling? And what about races that are less fleshed out by fans/official books, like goblins?
Although I'm primarily interested in generic D&D (like Greyhawk or FR) and official lore on this topic, I'd also like to read something about other, more original settings (like Eberron) or even your homebrew stuff (because I assume there won't be that much official material on attractiveness). I'm slowly creating my own setting and I'm gathering ideas for... things.
It's a tough question, really, and I don't recall anything I've read talking about the details of attraction among these races.
From our, human, point of view, we probably wouldn't be aware of the actual detail of the attraction between humanoid creatures that are so different to us. Orcs may well be attracted to extra-strong individuals, or those with long tusks. Or something subtle that we just wouldn't appreciate. And you might even find that the average orc taste is diverse - so different things are attractive to different clans.
There may also be other cultural difference - where physical attraction isn't really on the agenda - you may want to opt for the scenario where orc and goblin societies are so founded on brutality that the strongest just take what they want from the weakest anyway.
And elf society would be completely different - they've much less need to reproduce (they have such long lifespans) and so would be far more interested in other stuff, like intellect or skills in particular areas (poetry or singing, etc.)
At the end of the day, such social interactions as this may help define the differences between the races for you - but it's your world, and you get to choose what's best for you here.