The act of docking is when one male stretches the foreskin of his penis over another mans penis. Docking will result in a more satisfactory orgasm if one or both men ejaculate a bit during or before the act. Too much semen will make it more awkward to move around inside the mans foreskin.
When a man with an un-circumcised penis, rolls his extra skin on a circumcised man's penis. Looks like an anteater eating a bratwurst, or a tan snake eating another tan snake