With a little arm-twisting by new flame Charlize Theron, actor Sean Penn decided to donate his 65 guns to artist Jeff Koons, who will melt the firearms down to create a sculpture.

People Charlize Theron Convinced Sean Penn to Get Rid of His Gun Collection—So He Asked Jeff Koons to Turn Them All Into a Sculpture. CNN anchor Anderson Cooper placed the winning $1.4 million ...