The adult penis has an amazingly mobile skin system. Most foreskins can be retracted to the point where the glans is exposed and a large part of the shaft covered by the inner mucosal lining. To see an illustration of this go to http://www.foreskin.org
, enter the site, and scroll down to 'the three zones of penile skin'.
As Sarah pointed out, some men live out their lives quite happily with a non retractile foreskin, presumably because they have enough skin to comfortably cover a full erection. There is lots of information on treatments at http://www.cirp.org/library/treatment/phimosis/
and if you scroll down to the end of the discourse on treatment with topical steroids you will find the latest paper, written by some canadian doctors in Kingston, Ont. Or just add ashfield1/ to the above url.
Your Dh is very lucky a noth american dr did not catch him, as they very likely would have deemed he had a problem and circumcised him. Such is the single mindedness of our medical community - most still are not aware of all the treatment options or even the option of leaving it alone !!