Cumrags are a fairly recent invention.  Historically, across cultures, the genders have tended to keep to themselves, and men have traditionally not wasted their semen but rather shared it as a tonic for manliness.  Only gays sucked dick, and the rest of the men jerked off into each other's mouths or licked the spent jizz off each other's bodies.  They swallowed cum to boost their testosterone and cultivate more masculine physiques.  Semen was occasionally used as a lotion to foster beard growth and to thicken chest hair.  For a fascinating look into gay sexuality in olden times, one of the very best books is Sodomy and the Pirate Tradition.