|Dave Gaider from Bioware was interviewed by the guy from Dragons Breath Forge. They took questions from visitors and this is one of them:
1. In Baldur's Gate, what is with the golden pantaloons? Is there a point to them? Or what?
Submitted by mangafee
The golden pantaloons are part of a very long, and very silly, Easter Egg.
Basically, if you save the golden pantaloons from BG1, the silver pantaloons from BG2 and get the bronze pantalettes in ToB the three of them can be used in ToB to get something very odd and, um, very powerful. It was all just a lark...maybe the longest and most complex Easter Egg ever, who knows?
It's just supposed to be a gag, though...something that started as an in-office joke.