You can get a pair for just $18!
As the ad says, “you don’t need to be a semiotician to know that these bad boys are full of meaning.” And don’t forget to “note also that these high-quality brass balls re-gift beautifully.”
They’ve clearly thought of these as a gift for men. But why limit ourselves that way?
(Thanks, Mr Jender!)
Feminist Philosophers 
In the unlikely event anyone is unfamiliar with the source.