"Do gang rapists usually lube up? "
Well yes of course, they do this after putting on the false mustache, the raping jackets and of course the full body condom made from a secret material cooked up in a Duke chem lab. This is all before they get the broomsticks out, but during the phone calls to girlfriends and take out joints.
Its all in the "Nancy Grace Handbook for Gang Rapists".
It's also the magic lube that leaves no trace...
The Duke lacrosse players are so smart the invented a special undetectable lube to use in gang rapes. :-)