Gnu's question is a very valid and important one.

Does any uncircumcised male reading this have difficulty retracting the foreskin, or is it something that all men are able to accomplish in time?

In particular, are they able to retract fully while having an erection ? The reason I ask is because I would imagine that there would be no bigger turn-off for a woman than an unretractable foreskin on their partner's penis.