Anti-circumcision mythology:

Perhaps the most pervasive anti-circumcision myth is that the sex is worse. This seems to be entirely a matter of personal preference.

Some women have indicated that cut men fuck more violently, so the sex is more painful, but others say they prefer the aesthetic of the cut penis. There doesn't seem to be any universal preference, and I find it highly unlikely that foreskin status ever broke an otherwise healthy relationship.

Among men who have gotten circumcised in adulthood, some are happy with the result and others are not. There was one case in which the man was so distraught that he ended up killing himself, but this man did very little research beforehand and basically just took the advice of a urologist without thinking. Those who do more research in advance seem to be more happy with the result.