When you give a guy a hand job does it make a difference whether he has a foreskin or not?

When a guy is circumcised he has no foreskin covering his glans. So when you stimulate his penis you stimulate the glans directly. But if a guy is not circumcised the glans may be too sensitive to touch directly. It’s comparable to the clitoris, which can be so sensitive that a girl doesn’t touch it directly. This is solved by moving the foreskin up and down, stroking the glans indirectly. You should ask the guy, for it also gives guys who are not circumcised but like their glans to be touched directly. You can ask him to show you what he does when he masturbates.