A guy walks into a store to buy brains. He asks the woman behind the counter how much each of the brains cost. They saleswoman tells him, $5/gram for womens brains, $20/gram for dogs brains, and $100/gram for mens brains.

So the guy is surprised with the varying prices, and he asks the saleswoman, How come mens brains are so much more expensive than womens brains or dogs brains?

And the saleswoman replies, Are you kidding!?!?!?!? Do you know how many men it takes to get a gram of brains????