More useful Golden Swords.

I'm suggesting only making a small tweak to golden swords in order to make them something more than just pretty golden alternatives to your powerful iron and diamond swords. A small upgrade could come in the form of bonus XP for using them to slay mobs (Either only hostile mobs, or all mobs). This could add a nice risk-reward element to choosing the weapons you use by giving you the option to be safe and use your powerful diamond sword, or risk getting overpowered by hostile mobs by using your glistening golden sword in order to snag more XP. This small addition would also fit quite well with the current risk-reward element of using (most) golden tools, as all of them have very impressive mining speeds for their respective blocks, though lack heavily in other areas, namely durability.