Difficulty retracting the foreskin varies, but it's not usually a problem. One of my son's had an easily retractable foreskin fairly early on & one didn't until into puberty. He's had sex as a young man w/ no problem & both of my sons are glad they weren't circumcised. One is convinced it will make sex more fun for him & his partner, which some sources seems to agree w/. He's the one who hasn't had sex yet, so we can't be sure. You are not supposed to force the foreskin back--just retract it gently. Cleanliness was never an issue w/ my sons. When they were small, I cleaned all of their body parts. As they got older--what do you know!--they did it themselves. Duh. I made the decision not to circumcise my firstborn when he had to, unexpectedly, start his life in neonatal intensive care. I didn't see why he needed more trauma. I was leaning that way, anyway, the procedure being medically unnecessary. Once one of my sons was uncircumcised, it seemed silly to circumcise the younger.

bbc