It's always kind of a joke in our culture, about the 1 minute man, or the 30 second guy, but this is a source of humiliation for men, it's not something men are proud of, it's embarrassing and can be a downer for the relationship. However, at the end of the day it's also an aspect of sexuality that can be healed.
Going in with mutual respect and admiration is always going to be more helpful than criticizing, nagging, taking it personally.