I think mime porn might be the best.
Awesome
I was going to sick some foil on the box and use loo roll core to make eye holes. Also, because it's for a party, I'm going to need some method of refilling and venting fluids. Rubber tubing or straws could solve both problems, but I worry about hygiene.
Don't wear a mask. Construct some glasses and hat that look robotic or paint your face along with those things.
A smaller box as a hat would work perfectly and you could still drink comfortably.
Also, don't use leg holes. Make sure the box doesn't have a bottom, and you can easily retract your arms into
the box to get at your goods.
The biggest mistake with Halloween costumes if you plan on drinking is a mask and lack of comfortable access to the pants.
Porn is boring. Why watch something when you can be doing it?
I am not wealthy enough to afford hookers, and my wife thinks I'm fat and ugly