A new and innovative sexual position between two homosexual males. The male with the smaller genitalia will insert his penis (or barrel) into the other gay's penis, thereby arousing and pleasuring both partners.
Gayboy#1: "I can't wait to shove my tiny pecker inside your huge willy"
Gayboy#2: "Double BarrelFuntime is super sexy fun, even for the person getting his boner penetrated!"