Here in Georgia, I noticed about 5yrs ago, that all the nozzles suddenly were replaced with those which "cut off" before a tank is filled. I drove an explorer with inop gas gage, and after the new nozzles could always work to squeeze another 4 gal into the tank after shut-off. It really matters when you refill according to the odometer.
So.....if I actually had a foreskin, I'd definately peel it back before inserting into the hole, then squeeze gently and watch carefully to avoid splatter and spillage. Sometimes it splatters all over the place and quits immediately if I squeeze too hard, best to let it slowly trickle until it's up to the rim. Wiping off the spillage is no fun, gets your hands all smelly etc.
