The act act of one man rolling back his foreskin and allow another man to roll his foreskin over the first mans exposed penis head. the first man then rolls his foeskin overtop the other forseskin effectively locking the 2 penises together in a chineeese finger trap connection.
Matt and Damon got stuck in a double docking scenario where all peaople involved had a very good time.
Two ant eaters - the first guy pulls back foreskin, second guy puts foreskin over first guy and then first guy puts his foreskin over top of second guys foreskin.
Scott held back his foreskin so he could feel brad's foreskin on his pulled back dick, and then brad sweater hugged his foreskin on scotts foreskin hence double docking
An uncircumcised man pulls back his foreskin then docks with another uncircumcised man. The first man layers his foreskin over the the second mans dock and the act is complete.