I am smaller than average, natural and grew up in the USA. Anytime I find another cock that looks like mine, especially with a tight foreskin, I can't help but look. Until the internet came along, I didn't know there were others like me and I now see the whole world has cocks like mine!
Having a tight foreskin, I prefer her to start with my foreskin nipple, gently insert tongue and use it along with her lips to work the foreskin back super slowly, so I can feel the skin being stretched as it strains against my blood filled cock head! Ever since forced retraction as a child and the pain, I've had a thing for tight foreskin retraction.
How small is the opening in the foreskin? Can you see the meatus? If so, you may start with a Q-Tip to start the stretching process...if bigger, then try to push the glans through the opening by pulling back on the foreskin...there should be some discomfort, but not too painful.