Controversial thread is controversial? Sorry, but... fail thread is fail.
Clothes have multiple purposes. They keep us warm. They give us protection from places we might otherwise get all scratched up. They also prevent massive orgies from taking place during business meetings.
Suppose the lady giving the speach is INCREDIBLY attractive. So are a few other ladies at the meeting, and so are many of the guys. They'd start talking about a business proposal and end up having fun with each other on the table. And considering that people can be very judgemental on physical attractiveness (even if they don't admit it, everyone is to a point) people who aren't blessed physically would be ridiculed left and right, if not by words it would be by the looks people give them.
Nudity has its place. Among people that think the same way, at home when you're alone, skinny dipping or, of course, sex (and sometimes not even then) but I think clothes are a necessity.
And if that didn't help you put things in perspective... without clothes, you'd have to see your mother naked. ALL THE TIME. Don't even try to act like that wouldn't bother you.
EDIT:
SmilingKitsune said:
Nudity facinates me(no not in that way), take for instance breasts, what is it about this particular part of a woman's body that's so incredibly arousing?
I think it has a lot to do with it being taboo, imagine a world where everyone covered up their ears, would it make ears instantly sexy?
Breasts are an intense pleasure center on the female body. Plus, you ever played with them? They're fun!