Pull the skin back, ride the rodeo. Problem solved.
Especially if you say the sex is great! And keeps himself clean? Don't let no little foreskin scare you.
I think you should honestly just try to get adapted to the skin being there until he decides he wants to get circumcised. And if he never does, then, yea....he just may cheat because of that. Cause most women don't care...we'll pull the skin back and take care of business. Especially if its some great dick attached to a good man.
Just my thoughts. Apologies if the post comes off as rude.