Fever (2006)

Eastern block scientists have developed a unique biological weapon-sex gas. Its irresistible effect causes soldiers to have unbridled and passionate sex with each other. In five duo and three-way scenes, Fever documents soldiers shredding their uniforms and ravenously devouring their buddies. Then they turn on their Commanding Officers, take them captive, and punish them with equal parts retribution and plain old lust. Fever's final five-man orgy is a pileup of butt spanking and ass penetrating punishment.