Not sure I understand, but you grab below glans and force foreskin on and off the penis head repeatedly. Don’t have to pull it all the way to the tip, going halfway is enough. The foreskin skin is much smoother than hands, so barely any lube is required, just the natural skin oil is enough. I wouldn’t call it smegma as it usually refers to white substance full of dead skins and bacteria, but the underside of healthy clean penis foreskin is naturally a little wet.
Not sure I understand, but you grab below glans and force foreskin on and off the penis head repeatedly. Don’t have to pull it all the way to the tip, going halfway is enough. The foreskin skin is much smoother than hands, so barely any lube is required, just the natural skin oil is enough. I wouldn’t call it smegma as it usually refers to white substance full of dead skins and bacteria, but the underside of healthy clean penis foreskin is naturally a little wet.